19409972676 has 12 divisors (see below), whose sum is σ = 45289936272. Its totient is φ = 6469990888.

The previous prime is 19409972669. The next prime is 19409972689. The reversal of 19409972676 is 67627990491.

It is a tau number, because it is divible by the number of its divisors (12).

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, 808748850 + ... + 808748873.

It is an arithmetic number, because the mean of its divisors is an integer number (3774161356).

Almost surely, 2^19409972676 is an apocalyptic number.

It is an amenable number.

19409972676 is an abundant number, since it is smaller than the sum of its proper divisors (25879963596).

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

19409972676 is a wasteful number, since it uses less digits than its factorization.

19409972676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1617497730 (or 1617497728 counting only the distinct ones).

The product of its (nonzero) digits is 10287648, while the sum is 60.

The spelling of 19409972676 in words is "nineteen billion, four hundred nine million, nine hundred seventy-two thousand, six hundred seventy-six".