18036923520 has 768 divisors, whose sum is σ = 75600604800. Its totient is φ = 3612672000.

The previous prime is 18036923479. The next prime is 18036923579. The reversal of 18036923520 is 2532963081.

It is a super-2 number, since 2×18036923520² (a number of 21 digits) contains 22 as substring.

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 95 ways as a sum of consecutive naturals, for example, 30011220 + ... + 30011820.

Almost surely, 2^18036923520 is an apocalyptic number.

18036923520 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 18036923520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37800302400).

18036923520 is an abundant number, since it is smaller than the sum of its proper divisors (57563681280).

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

18036923520 is a wasteful number, since it uses less digits than its factorization.

18036923520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677 (or 658 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 18036923520 in words is "eighteen billion, thirty-six million, nine hundred twenty-three thousand, five hundred twenty".