19605921204 has 24 divisors (see below), whose sum is σ = 45753329440. Its totient is φ = 6534424224.

The previous prime is 19605921193. The next prime is 19605921217. The reversal of 19605921204 is 40212950691.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14494 + ... + 198549.

Almost surely, 2^19605921204 is an apocalyptic number.

It is an amenable number.

19605921204 is an abundant number, since it is smaller than the sum of its proper divisors (26147408236).

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

19605921204 is a wasteful number, since it uses less digits than its factorization.

19605921204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220719 (or 220717 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The spelling of 19605921204 in words is "nineteen billion, six hundred five million, nine hundred twenty-one thousand, two hundred four".