18324931 has 2 divisors, whose sum is σ = 18324932. Its totient is φ = 18324930.

The previous prime is 18324913. The next prime is 18324941. The reversal of 18324931 is 13942381.

Together with previous prime (18324913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (13942381) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18324931 is a prime.

It is a super-2 number, since 2×18324931² = 671606192309522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18324893 and 18324902.

It is not a weakly prime, because it can be changed into another prime (18324941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9162465 + 9162466.

It is an arithmetic number, because the mean of its divisors is an integer number (9162466).

Almost surely, 2^18324931 is an apocalyptic number.

18324931 is a deficient number, since it is larger than the sum of its proper divisors (1).

18324931 is an equidigital number, since it uses as much as digits as its factorization.

18324931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 31.

The square root of 18324931 is about 4280.7628992973. The cubic root of 18324931 is about 263.6417076746.

The spelling of 18324931 in words is "eighteen million, three hundred twenty-four thousand, nine hundred thirty-one".