18401031 has 12 divisors (see below), whose sum is σ = 28995720. Its totient is φ = 11152080.

The previous prime is 18401029. The next prime is 18401041. The reversal of 18401031 is 13010481.

It is not a de Polignac number, because 18401031 - 2¹ = 18401029 is a prime.

It is a super-2 number, since 2×18401031² = 677195883725922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18400995 and 18401013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18401041) 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 11 ways as a sum of consecutive naturals, for example, 92836 + ... + 93033.

It is an arithmetic number, because the mean of its divisors is an integer number (2416310).

Almost surely, 2^18401031 is an apocalyptic number.

18401031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18401031 is a deficient number, since it is larger than the sum of its proper divisors (10594689).

18401031 is a wasteful number, since it uses less digits than its factorization.

18401031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185886 (or 185883 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 18401031 is about 4289.6422927792. The cubic root of 18401031 is about 264.0061551595.

It can be divided in two parts, 184010 and 31, that added together give a square (184041 = 429²).

The spelling of 18401031 in words is "eighteen million, four hundred one thousand, thirty-one".