19404026604 has 120 divisors (see below), whose sum is σ = 51212045808. Its totient is φ = 6406335360.

The previous prime is 19404026561. The next prime is 19404026639. The reversal of 19404026604 is 40662040491.

19404026604 is a `hidden beast` number, since 1 + 9 + 4 + 0 + 40 + 2 + 6 + 604 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 24345934 + ... + 24346730.

Almost surely, 2^19404026604 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19404026604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25606022904).

19404026604 is an abundant number, since it is smaller than the sum of its proper divisors (31808019204).

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

19404026604 is a wasteful number, since it uses less digits than its factorization.

19404026604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437 (or 1426 counting only the distinct ones).

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

The spelling of 19404026604 in words is "nineteen billion, four hundred four million, twenty-six thousand, six hundred four".