20923128234 has 24 divisors (see below), whose sum is σ = 45570799872. Its totient is φ = 6937859880.

The previous prime is 20923128229. The next prime is 20923128271. The reversal of 20923128234 is 43282132902.

20923128234 is a `hidden beast` number, since 20 + 92 + 312 + 8 + 234 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3039484 + ... + 3046359.

It is an arithmetic number, because the mean of its divisors is an integer number (1898783328).

Almost surely, 2^20923128234 is an apocalyptic number.

20923128234 is an abundant number, since it is smaller than the sum of its proper divisors (24647671638).

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

20923128234 is a wasteful number, since it uses less digits than its factorization.

20923128234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6086042 (or 6086039 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 20923128234 in words is "twenty billion, nine hundred twenty-three million, one hundred twenty-eight thousand, two hundred thirty-four".