20202221928 has 64 divisors (see below), whose sum is σ = 57735308160. Its totient is φ = 5770596096.

The previous prime is 20202221891. The next prime is 20202221929. The reversal of 20202221928 is 82912220202.

It is a junction number, because it is equal to n+sod(n) for n = 20202221895 and 20202221904.

It is not an unprimeable number, because it can be changed into a prime (20202221929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 766050 + ... + 791982.

It is an arithmetic number, because the mean of its divisors is an integer number (902114190).

Almost surely, 2^20202221928 is an apocalyptic number.

20202221928 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20202221928 is an abundant number, since it is smaller than the sum of its proper divisors (37533086232).

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

20202221928 is a wasteful number, since it uses less digits than its factorization.

20202221928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30586 (or 30582 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The spelling of 20202221928 in words is "twenty billion, two hundred two million, two hundred twenty-one thousand, nine hundred twenty-eight".