20220001020 has 288 divisors, whose sum is σ = 66414566400. Its totient is φ = 4963825152.

The previous prime is 20220000973. The next prime is 20220001027. The reversal of 20220001020 is 2010002202.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20220000993 and 20220001011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220001027) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18101502 + ... + 18102618.

Almost surely, 2^20220001020 is an apocalyptic number.

20220001020 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 20220001020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33207283200).

20220001020 is an abundant number, since it is smaller than the sum of its proper divisors (46194565380).

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

20220001020 is a wasteful number, since it uses less digits than its factorization.

20220001020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297 (or 1292 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 20220001020 its reverse (2010002202), we get a palindrome (22230003222).

The spelling of 20220001020 in words is "twenty billion, two hundred twenty million, one thousand, twenty".