20023122211220 has 96 divisors (see below), whose sum is σ = 43780368844800. Its totient is φ = 7686515865600.

The previous prime is 20023122211181. The next prime is 20023122211307. The reversal of 20023122211220 is 2211222132002.

It is a super-3 number, since 3×20023122211220³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 20023122211192 and 20023122211201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16985096 + ... + 18125664.

It is an arithmetic number, because the mean of its divisors is an integer number (456045508800).

Almost surely, 2^{20023122211220} is an apocalyptic number.

20023122211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20023122211220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21890184422400).

20023122211220 is an abundant number, since it is smaller than the sum of its proper divisors (23757246633580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20023122211220 is a wasteful number, since it uses less digits than its factorization.

20023122211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140969 (or 1140967 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 20023122211220 its reverse (2211222132002), we get a palindrome (22234344343222).

The spelling of 20023122211220 in words is "twenty trillion, twenty-three billion, one hundred twenty-two million, two hundred eleven thousand, two hundred twenty".