20108900828 has 48 divisors (see below), whose sum is σ = 37279642176. Its totient is φ = 9471897600.

The previous prime is 20108900813. The next prime is 20108900831. The reversal of 20108900828 is 82800980102.

It is a junction number, because it is equal to n+sod(n) for n = 20108900791 and 20108900800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1787750 + ... + 1798962.

It is an arithmetic number, because the mean of its divisors is an integer number (776659212).

Almost surely, 2^20108900828 is an apocalyptic number.

It is an amenable number.

20108900828 is a deficient number, since it is larger than the sum of its proper divisors (17170741348).

20108900828 is a wasteful number, since it uses less digits than its factorization.

20108900828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11534 (or 11532 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 38.

The spelling of 20108900828 in words is "twenty billion, one hundred eight million, nine hundred thousand, eight hundred twenty-eight".