18400182220 has 48 divisors (see below), whose sum is σ = 46758116160. Its totient is φ = 5937537024.

The previous prime is 18400182181. The next prime is 18400182239. The reversal of 18400182220 is 2228100481.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

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, 3863205 + ... + 3867964.

It is an arithmetic number, because the mean of its divisors is an integer number (974127420).

Almost surely, 2^18400182220 is an apocalyptic number.

18400182220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18400182220 is an abundant number, since it is smaller than the sum of its proper divisors (28357933940).

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

18400182220 is a wasteful number, since it uses less digits than its factorization.

18400182220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7731202 (or 7731200 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 28.

The spelling of 18400182220 in words is "eighteen billion, four hundred million, one hundred eighty-two thousand, two hundred twenty".