18312453 has 16 divisors (see below), whose sum is σ = 27762240. Its totient is φ = 11923632.

The previous prime is 18312431. The next prime is 18312457. The reversal of 18312453 is 35421381.

It is a happy number.

It is not a de Polignac number, because 18312453 - 2⁵ = 18312421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18312457) 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, 6726 + ... + 9047.

It is an arithmetic number, because the mean of its divisors is an integer number (1735140).

Almost surely, 2^18312453 is an apocalyptic number.

It is an amenable number.

18312453 is a deficient number, since it is larger than the sum of its proper divisors (9449787).

18312453 is a wasteful number, since it uses less digits than its factorization.

18312453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15825 (or 15819 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 18312453 is about 4279.3052006138. The cubic root of 18312453 is about 263.5818535484.

The spelling of 18312453 in words is "eighteen million, three hundred twelve thousand, four hundred fifty-three".