18180953880 has 64 divisors (see below), whose sum is σ = 54553811040. Its totient is φ = 4847281152.

The previous prime is 18180953867. The next prime is 18180953891. The reversal of 18180953880 is 8835908181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 741172 + ... + 765308.

Almost surely, 2^18180953880 is an apocalyptic number.

18180953880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18180953880 is an abundant number, since it is smaller than the sum of its proper divisors (36372857160).

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

18180953880 is a wasteful number, since it uses less digits than its factorization.

18180953880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30428 (or 30424 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 51.

The spelling of 18180953880 in words is "eighteen billion, one hundred eighty million, nine hundred fifty-three thousand, eight hundred eighty".