18736040520 has 192 divisors, whose sum is σ = 62764416000. Its totient is φ = 4844634624.

The previous prime is 18736040509. The next prime is 18736040569. The reversal of 18736040520 is 2504063781.

18736040520 is a `hidden beast` number, since 1 + 8 + 73 + 60 + 4 + 0 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1839201 + ... + 1849359.

It is an arithmetic number, because the mean of its divisors is an integer number (326898000).

Almost surely, 2^18736040520 is an apocalyptic number.

18736040520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18736040520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31382208000).

18736040520 is an abundant number, since it is smaller than the sum of its proper divisors (44028375480).

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

18736040520 is a wasteful number, since it uses less digits than its factorization.

18736040520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10332 (or 10325 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 18736040520 in words is "eighteen billion, seven hundred thirty-six million, forty thousand, five hundred twenty".