18514431 has 12 divisors (see below), whose sum is σ = 28800408. Its totient is φ = 11393424.

The previous prime is 18514429. The next prime is 18514451. The reversal of 18514431 is 13441581.

It is a happy number.

It is not a de Polignac number, because 18514431 - 2¹ = 18514429 is a prime.

It is a super-2 number, since 2×18514431² = 685568310507522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18514395 and 18514404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18514451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79005 + ... + 79238.

It is an arithmetic number, because the mean of its divisors is an integer number (2400034).

Almost surely, 2^18514431 is an apocalyptic number.

18514431 is a deficient number, since it is larger than the sum of its proper divisors (10285977).

18514431 is a wasteful number, since it uses less digits than its factorization.

18514431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158262 (or 158259 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 18514431 is about 4302.8398761748. The cubic root of 18514431 is about 264.5473749687.

The spelling of 18514431 in words is "eighteen million, five hundred fourteen thousand, four hundred thirty-one".