19012604436 has 36 divisors (see below), whose sum is σ = 54925302432. Its totient is φ = 5432172624.

The previous prime is 19012604417. The next prime is 19012604473. The reversal of 19012604436 is 63440621091.

19012604436 is a `hidden beast` number, since 1 + 9 + 0 + 1 + 2 + 604 + 43 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×19012604436² (a number of 21 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 19012604436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37723170 + ... + 37723673.

Almost surely, 2^19012604436 is an apocalyptic number.

It is an amenable number.

19012604436 is an abundant number, since it is smaller than the sum of its proper divisors (35912697996).

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

19012604436 is a wasteful number, since it uses less digits than its factorization.

19012604436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75446860 (or 75446855 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 19012604436 in words is "nineteen billion, twelve million, six hundred four thousand, four hundred thirty-six".