20222022420 has 144 divisors (see below), whose sum is σ = 61830857088. Its totient is φ = 5349576960.

The previous prime is 20222022391. The next prime is 20222022467. The reversal of 20222022420 is 2422022202.

It is a happy number.

20222022420 is a `hidden beast` number, since 2 + 0 + 2 + 220 + 22 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20222022393 and 20222022402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17268435 + ... + 17269605.

It is an arithmetic number, because the mean of its divisors is an integer number (429380952).

Almost surely, 2^20222022420 is an apocalyptic number.

20222022420 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 20222022420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30915428544).

20222022420 is an abundant number, since it is smaller than the sum of its proper divisors (41608834668).

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

20222022420 is a wasteful number, since it uses less digits than its factorization.

20222022420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1870 (or 1865 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

Adding to 20222022420 its reverse (2422022202), we get a palindrome (22644044622).

The spelling of 20222022420 in words is "twenty billion, two hundred twenty-two million, twenty-two thousand, four hundred twenty".