20902308028 has 24 divisors (see below), whose sum is σ = 42934472672. Its totient is φ = 8716019904.

The previous prime is 20902308019. The next prime is 20902308059. The reversal of 20902308028 is 82080320902.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20902307984 and 20902308002.

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 7 ways as a sum of consecutive naturals, for example, 10086951 + ... + 10089022.

Almost surely, 2^20902308028 is an apocalyptic number.

20902308028 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20902308028 is an abundant number, since it is smaller than the sum of its proper divisors (22032164644).

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

20902308028 is a wasteful number, since it uses less digits than its factorization.

20902308028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20176021 (or 20176019 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The spelling of 20902308028 in words is "twenty billion, nine hundred two million, three hundred eight thousand, twenty-eight".