18719165124 has 135 divisors (see below), whose sum is σ = 53866666623. Its totient is φ = 5664265200.

The previous prime is 18719165119. The next prime is 18719165173. The reversal of 18719165124 is 42156191781.

The square root of 18719165124 is 136818.

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

It is a self number, because there is not a number n which added to its sum of digits gives 18719165124.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 27089619 + ... + 27090309.

Almost surely, 2^18719165124 is an apocalyptic number.

18719165124 is the 136818-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18719165124

18719165124 is an abundant number, since it is smaller than the sum of its proper divisors (35147501499).

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

18719165124 is an equidigital number, since it uses as much as digits as its factorization.

18719165124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1420 (or 707 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The spelling of 18719165124 in words is "eighteen billion, seven hundred nineteen million, one hundred sixty-five thousand, one hundred twenty-four".