19867405508 has 12 divisors (see below), whose sum is σ = 35001302700. Its totient is φ = 9867033312.

The previous prime is 19867405477. The next prime is 19867405513. The reversal of 19867405508 is 80550476891.

It can be written as a sum of positive squares in 2 ways, for example, as 1691512384 + 18175893124 = 41128^2 + 134818^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 19867405508.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16666691 + ... + 16667882.

It is an arithmetic number, because the mean of its divisors is an integer number (2916775225).

Almost surely, 2^19867405508 is an apocalyptic number.

It is an amenable number.

19867405508 is a deficient number, since it is larger than the sum of its proper divisors (15133897192).

19867405508 is a wasteful number, since it uses less digits than its factorization.

19867405508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33334726 (or 33334724 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 53.

The spelling of 19867405508 in words is "nineteen billion, eight hundred sixty-seven million, four hundred five thousand, five hundred eight".