18470319839521 has 27 divisors (see below), whose sum is σ = 21224414222193. Its totient is φ = 16060202190120.

The previous prime is 18470319839519. The next prime is 18470319839551. The reversal of 18470319839521 is 12593891307481.

The square root of 18470319839521 is 4297711.

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

It is not a de Polignac number, because 18470319839521 - 2¹ = 18470319839519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18470319839521.

It is not an unprimeable number, because it can be changed into a prime (18470319839501) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1087312390 + ... + 1087329376.

Almost surely, 2^{18470319839521} is an apocalyptic number.

18470319839521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18470319839521 is the 4297711-st square number.

18470319839521 is the 2148856-th centered octagonal number.

It is an amenable number.

18470319839521 is a deficient number, since it is larger than the sum of its proper divisors (2754094382672).

18470319839521 is an frugal number, since it uses more digits than its factorization.

18470319839521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34042 (or 17021 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 61.

The spelling of 18470319839521 in words is "eighteen trillion, four hundred seventy billion, three hundred nineteen million, eight hundred thirty-nine thousand, five hundred twenty-one".