19267660864 has 21 divisors (see below), whose sum is σ = 38236468231. Its totient is φ = 9633275200.

The previous prime is 19267660861. The next prime is 19267660877. The reversal of 19267660864 is 46806676291.

The square root of 19267660864 is 138808.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19267660861) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1101789 + ... + 1119139.

Almost surely, 2^19267660864 is an apocalyptic number.

19267660864 is the 138808-th square number.

It is an amenable number.

19267660864 is a deficient number, since it is larger than the sum of its proper divisors (18968807367).

19267660864 is an frugal number, since it uses more digits than its factorization.

19267660864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34714 (or 17353 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 55.

The spelling of 19267660864 in words is "nineteen billion, two hundred sixty-seven million, six hundred sixty thousand, eight hundred sixty-four".