18148331 has 2 divisors, whose sum is σ = 18148332. Its totient is φ = 18148330.

The previous prime is 18148309. The next prime is 18148337. The reversal of 18148331 is 13384181.

It is a strong prime.

It is an emirp because it is prime and its reverse (13384181) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 18148331 - 2²² = 13954027 is a prime.

It is a super-2 number, since 2×18148331² = 658723836171122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18148294 and 18148303.

It is not a weakly prime, because it can be changed into another prime (18148337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9074165 + 9074166.

It is an arithmetic number, because the mean of its divisors is an integer number (9074166).

Almost surely, 2^18148331 is an apocalyptic number.

18148331 is a deficient number, since it is larger than the sum of its proper divisors (1).

18148331 is an equidigital number, since it uses as much as digits as its factorization.

18148331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 29.

The square root of 18148331 is about 4260.0857972581. The cubic root of 18148331 is about 262.7920546856.

The spelling of 18148331 in words is "eighteen million, one hundred forty-eight thousand, three hundred thirty-one".