18860131 has 2 divisors, whose sum is σ = 18860132. Its totient is φ = 18860130.

The previous prime is 18860111. The next prime is 18860159. The reversal of 18860131 is 13106881.

It is a happy number.

It is an a-pointer prime, because the next prime (18860159) can be obtained adding 18860131 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18860131 - 2⁷ = 18860003 is a prime.

It is a super-2 number, since 2×18860131² = 711409082674322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 18860131.

It is not a weakly prime, because it can be changed into another prime (18860111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9430065 + 9430066.

It is an arithmetic number, because the mean of its divisors is an integer number (9430066).

Almost surely, 2^18860131 is an apocalyptic number.

18860131 is a deficient number, since it is larger than the sum of its proper divisors (1).

18860131 is an equidigital number, since it uses as much as digits as its factorization.

18860131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 18860131 is about 4342.8252324955. The cubic root of 18860131 is about 266.1837679011.

The spelling of 18860131 in words is "eighteen million, eight hundred sixty thousand, one hundred thirty-one".