18536662080 has 364 divisors, whose sum is σ = 66818035020. Its totient is φ = 4897760256.

The previous prime is 18536662043. The next prime is 18536662087. The reversal of 18536662080 is 8026663581.

It can be written as a sum of positive squares in 2 ways, for example, as 9829532736 + 8707129344 = 99144^2 + 93312^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (18536662087) by changing a digit.

It is a polite number, since it can be written in 51 ways as a sum of consecutive naturals, for example, 170061066 + ... + 170061174.

Almost surely, 2^18536662080 is an apocalyptic number.

18536662080 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 18536662080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33409017510).

18536662080 is an abundant number, since it is smaller than the sum of its proper divisors (48281372940).

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

18536662080 is an frugal number, since it uses more digits than its factorization.

18536662080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 18536662080 in words is "eighteen billion, five hundred thirty-six million, six hundred sixty-two thousand, eighty".