18314431 has 8 divisors (see below), whose sum is σ = 18930384. Its totient is φ = 17707200.

The previous prime is 18314419. The next prime is 18314437. The reversal of 18314431 is 13441381.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18314431 - 2²³ = 9925823 is a prime.

It is a super-2 number, since 2×18314431² = 670836765707522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18314396 and 18314405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18314437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2235 + ... + 6451.

It is an arithmetic number, because the mean of its divisors is an integer number (2366298).

Almost surely, 2^18314431 is an apocalyptic number.

18314431 is a deficient number, since it is larger than the sum of its proper divisors (615953).

18314431 is a wasteful number, since it uses less digits than its factorization.

18314431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4361.

The product of its digits is 1152, while the sum is 25.

The square root of 18314431 is about 4279.5363066575. The cubic root of 18314431 is about 263.5913433772.

The spelling of 18314431 in words is "eighteen million, three hundred fourteen thousand, four hundred thirty-one".