18756131 has 2 divisors, whose sum is σ = 18756132. Its totient is φ = 18756130.

The previous prime is 18756071. The next prime is 18756139. The reversal of 18756131 is 13165781.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18756131 is a prime.

It is a super-2 number, since 2×18756131² = 703584900178322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18756139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9378065 + 9378066.

It is an arithmetic number, because the mean of its divisors is an integer number (9378066).

Almost surely, 2^18756131 is an apocalyptic number.

18756131 is a deficient number, since it is larger than the sum of its proper divisors (1).

18756131 is an equidigital number, since it uses as much as digits as its factorization.

18756131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 32.

The square root of 18756131 is about 4330.8349079594. The cubic root of 18756131 is about 265.6935954054.

The spelling of 18756131 in words is "eighteen million, seven hundred fifty-six thousand, one hundred thirty-one".