19491920204 has 24 divisors (see below), whose sum is σ = 34686682800. Its totient is φ = 9582805440.

The previous prime is 19491920179. The next prime is 19491920213. The reversal of 19491920204 is 40202919491.

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, 113519 + ... + 227750.

It is an arithmetic number, because the mean of its divisors is an integer number (1445278450).

Almost surely, 2^19491920204 is an apocalyptic number.

It is an amenable number.

19491920204 is a deficient number, since it is larger than the sum of its proper divisors (15194762596).

19491920204 is a wasteful number, since it uses less digits than its factorization.

19491920204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341513 (or 341511 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 41.

The spelling of 19491920204 in words is "nineteen billion, four hundred ninety-one million, nine hundred twenty thousand, two hundred four".