18331122379 has 2 divisors, whose sum is σ = 18331122380. Its totient is φ = 18331122378.

The previous prime is 18331122373. The next prime is 18331122409. The reversal of 18331122379 is 97322113381.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18331122379 - 2⁹ = 18331121867 is a prime.

It is not a weakly prime, because it can be changed into another prime (18331122373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9165561189 + 9165561190.

It is an arithmetic number, because the mean of its divisors is an integer number (9165561190).

Almost surely, 2^18331122379 is an apocalyptic number.

18331122379 is a deficient number, since it is larger than the sum of its proper divisors (1).

18331122379 is an equidigital number, since it uses as much as digits as its factorization.

18331122379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The spelling of 18331122379 in words is "eighteen billion, three hundred thirty-one million, one hundred twenty-two thousand, three hundred seventy-nine".