18601031 has 2 divisors, whose sum is σ = 18601032. Its totient is φ = 18601030.

The previous prime is 18601027. The next prime is 18601067. The reversal of 18601031 is 13010681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18601031 - 2² = 18601027 is a prime.

It is a super-2 number, since 2×18601031² = 691996708525922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 18600994 and 18601012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18601021) 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, 9300515 + 9300516.

It is an arithmetic number, because the mean of its divisors is an integer number (9300516).

Almost surely, 2^18601031 is an apocalyptic number.

18601031 is a deficient number, since it is larger than the sum of its proper divisors (1).

18601031 is an equidigital number, since it uses as much as digits as its factorization.

18601031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 18601031 is about 4312.8912576136. The cubic root of 18601031 is about 264.9592010288.

The spelling of 18601031 in words is "eighteen million, six hundred one thousand, thirty-one".