20900128424 has 16 divisors (see below), whose sum is σ = 44785989600. Its totient is φ = 8957197872.

The previous prime is 20900128399. The next prime is 20900128433. The reversal of 20900128424 is 42482100902.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186608234 + ... + 186608345.

It is an arithmetic number, because the mean of its divisors is an integer number (2799124350).

Almost surely, 2^20900128424 is an apocalyptic number.

It is an amenable number.

20900128424 is an abundant number, since it is smaller than the sum of its proper divisors (23885861176).

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

20900128424 is a wasteful number, since it uses less digits than its factorization.

20900128424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373216592 (or 373216588 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The spelling of 20900128424 in words is "twenty billion, nine hundred million, one hundred twenty-eight thousand, four hundred twenty-four".