18178953980 has 48 divisors (see below), whose sum is σ = 41843813760. Its totient is φ = 6579182400.

The previous prime is 18178953973. The next prime is 18178953983. The reversal of 18178953980 is 8935987181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18178953983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149390 + ... + 242229.

It is an arithmetic number, because the mean of its divisors is an integer number (871746120).

Almost surely, 2^18178953980 is an apocalyptic number.

18178953980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18178953980 is an abundant number, since it is smaller than the sum of its proper divisors (23664859780).

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

18178953980 is a wasteful number, since it uses less digits than its factorization.

18178953980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391850 (or 391848 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 59.

The spelling of 18178953980 in words is "eighteen billion, one hundred seventy-eight million, nine hundred fifty-three thousand, nine hundred eighty".