18314905354921 has 16 divisors (see below), whose sum is σ = 21201619517440. Its totient is φ = 15495866202960.

The previous prime is 18314905354913. The next prime is 18314905354927. The reversal of 18314905354921 is 12945350941381.

It is a cyclic number.

It is not a de Polignac number, because 18314905354921 - 2³ = 18314905354913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18314905354927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1980585 + ... + 6368086.

It is an arithmetic number, because the mean of its divisors is an integer number (1325101219840).

Almost surely, 2^{18314905354921} is an apocalyptic number.

It is an amenable number.

18314905354921 is a deficient number, since it is larger than the sum of its proper divisors (2886714162519).

18314905354921 is an equidigital number, since it uses as much as digits as its factorization.

18314905354921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8352724.

The product of its (nonzero) digits is 4665600, while the sum is 55.

The spelling of 18314905354921 in words is "eighteen trillion, three hundred fourteen billion, nine hundred five million, three hundred fifty-four thousand, nine hundred twenty-one".