19551364072 has 64 divisors (see below), whose sum is σ = 38517930000. Its totient is φ = 9291448320.

The previous prime is 19551364057. The next prime is 19551364081. The reversal of 19551364072 is 27046315591.

It can be written as a sum of positive squares in 8 ways, for example, as 5588160516 + 13963203556 = 74754^2 + 118166^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4974204 + ... + 4978132.

Almost surely, 2^19551364072 is an apocalyptic number.

It is an amenable number.

19551364072 is a deficient number, since it is larger than the sum of its proper divisors (18966565928).

19551364072 is a wasteful number, since it uses less digits than its factorization.

19551364072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4294 (or 4290 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 19551364072 in words is "nineteen billion, five hundred fifty-one million, three hundred sixty-four thousand, seventy-two".