19923929228 has 12 divisors (see below), whose sum is σ = 39847858512. Its totient is φ = 8538826800.

The previous prime is 19923929171. The next prime is 19923929231. The reversal of 19923929228 is 82292932991.

19923929228 is an admirable 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, 355784423 + ... + 355784478.

It is an arithmetic number, because the mean of its divisors is an integer number (3320654876).

Almost surely, 2^19923929228 is an apocalyptic number.

It is an amenable number.

19923929228 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

19923929228 is a wasteful number, since it uses less digits than its factorization.

19923929228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711568912 (or 711568910 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 56.

The spelling of 19923929228 in words is "nineteen billion, nine hundred twenty-three million, nine hundred twenty-nine thousand, two hundred twenty-eight".