19697456015 has 16 divisors (see below), whose sum is σ = 24036604416. Its totient is φ = 15491788800.

The previous prime is 19697456003. The next prime is 19697456057. The reversal of 19697456015 is 51065479691.

It is not a de Polignac number, because 19697456015 - 2²⁰ = 19696407439 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 628559 + ... + 659151.

It is an arithmetic number, because the mean of its divisors is an integer number (1502287776).

Almost surely, 2^19697456015 is an apocalyptic number.

19697456015 is a deficient number, since it is larger than the sum of its proper divisors (4339148401).

19697456015 is a wasteful number, since it uses less digits than its factorization.

19697456015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32770.

The product of its (nonzero) digits is 2041200, while the sum is 53.

The spelling of 19697456015 in words is "nineteen billion, six hundred ninety-seven million, four hundred fifty-six thousand, fifteen".