18026931 has 16 divisors (see below), whose sum is σ = 26216960. Its totient is φ = 10951200.

The previous prime is 18026927. The next prime is 18026941. The reversal of 18026931 is 13962081.

It is not a de Polignac number, because 18026931 - 2² = 18026927 is a prime.

It is a super-2 number, since 2×18026931² = 649940482557522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18026941) 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 in 15 ways as a sum of consecutive naturals, for example, 156 + ... + 6006.

It is an arithmetic number, because the mean of its divisors is an integer number (1638560).

Almost surely, 2^18026931 is an apocalyptic number.

18026931 is a deficient number, since it is larger than the sum of its proper divisors (8190029).

18026931 is a wasteful number, since it uses less digits than its factorization.

18026931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5946.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 18026931 is about 4245.8133496422. The cubic root of 18026931 is about 262.2047764881.

It can be divided in two parts, 180269 and 31, that added together give a triangular number (180300 = T₆₀₀).

The spelling of 18026931 in words is "eighteen million, twenty-six thousand, nine hundred thirty-one".