18535188736 has 81 divisors (see below), whose sum is σ = 37856489139. Its totient is φ = 9057388032.

The previous prime is 18535188701. The next prime is 18535188811. The reversal of 18535188736 is 63788153581.

The square root of 18535188736 is 136144.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 145946305 + ... + 145946431.

Almost surely, 2^18535188736 is an apocalyptic number.

18535188736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

18535188736 is the 136144-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18535188736

18535188736 is an abundant number, since it is smaller than the sum of its proper divisors (19321300403).

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

18535188736 is an frugal number, since it uses more digits than its factorization.

18535188736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404 (or 196 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 55.

The spelling of 18535188736 in words is "eighteen billion, five hundred thirty-five million, one hundred eighty-eight thousand, seven hundred thirty-six".