18388314570 has 64 divisors (see below), whose sum is σ = 46558800000. Its totient is φ = 4635058176.

The previous prime is 18388314559. The next prime is 18388314613. The reversal of 18388314570 is 7541388381.

It is a happy number.

It is a super-2 number, since 2×18388314570² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 220006 + ... + 291854.

It is an arithmetic number, because the mean of its divisors is an integer number (727481250).

Almost surely, 2^18388314570 is an apocalyptic number.

18388314570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18388314570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23279400000).

18388314570 is an abundant number, since it is smaller than the sum of its proper divisors (28170485430).

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

18388314570 is a wasteful number, since it uses less digits than its factorization.

18388314570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72327.

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 18388314570 in words is "eighteen billion, three hundred eighty-eight million, three hundred fourteen thousand, five hundred seventy".