18331122380 has 24 divisors (see below), whose sum is σ = 39535773648. Its totient is φ = 7134274368.

The previous prime is 18331122379. The next prime is 18331122409. The reversal of 18331122380 is 8322113381.

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 7 ways as a sum of consecutive naturals, for example, 12385154 + ... + 12386633.

It is an arithmetic number, because the mean of its divisors is an integer number (1647323902).

Almost surely, 2^18331122380 is an apocalyptic number.

18331122380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18331122380 is an abundant number, since it is smaller than the sum of its proper divisors (21204651268).

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

18331122380 is a wasteful number, since it uses less digits than its factorization.

18331122380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24771833 (or 24771831 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The spelling of 18331122380 in words is "eighteen billion, three hundred thirty-one million, one hundred twenty-two thousand, three hundred eighty".