18242931 has 16 divisors (see below), whose sum is σ = 27917568. Its totient is φ = 10380000.

The previous prime is 18242899. The next prime is 18242951. The reversal of 18242931 is 13924281.

It is not a de Polignac number, because 18242931 - 2⁵ = 18242899 is a prime.

It is a super-2 number, since 2×18242931² = 665609062941522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18242951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3541 + ... + 7001.

It is an arithmetic number, because the mean of its divisors is an integer number (1744848).

Almost surely, 2^18242931 is an apocalyptic number.

18242931 is a deficient number, since it is larger than the sum of its proper divisors (9674637).

18242931 is a wasteful number, since it uses less digits than its factorization.

18242931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3722.

The product of its digits is 3456, while the sum is 30.

The square root of 18242931 is about 4271.1744286554. The cubic root of 18242931 is about 263.2478736022.

The spelling of 18242931 in words is "eighteen million, two hundred forty-two thousand, nine hundred thirty-one".