18700545864 has 512 divisors, whose sum is σ = 67408588800. Its totient is φ = 4162129920.

The previous prime is 18700545841. The next prime is 18700545907. The reversal of 18700545864 is 46854500781.

It is a super-2 number, since 2×18700545864² (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 (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 24191782 + ... + 24192554.

It is an arithmetic number, because the mean of its divisors is an integer number (131657400).

Almost surely, 2^18700545864 is an apocalyptic number.

18700545864 is a gapful number since it is divisible by the number (14) 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 18700545864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33704294400).

18700545864 is an abundant number, since it is smaller than the sum of its proper divisors (48708042936).

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

18700545864 is a wasteful number, since it uses less digits than its factorization.

18700545864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885 (or 881 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 48.

The spelling of 18700545864 in words is "eighteen billion, seven hundred million, five hundred forty-five thousand, eight hundred sixty-four".