18340453 has 8 divisors (see below), whose sum is σ = 20145600. Its totient is φ = 16619328.

The previous prime is 18340429. The next prime is 18340457. The reversal of 18340453 is 35404381.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18340453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18340457) 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, 20548 + ... + 21421.

It is an arithmetic number, because the mean of its divisors is an integer number (2518200).

Almost surely, 2^18340453 is an apocalyptic number.

It is an amenable number.

18340453 is a deficient number, since it is larger than the sum of its proper divisors (1805147).

18340453 is a wasteful number, since it uses less digits than its factorization.

18340453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42011.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 18340453 is about 4282.5755101341. The cubic root of 18340453 is about 263.7161252662.

The spelling of 18340453 in words is "eighteen million, three hundred forty thousand, four hundred fifty-three".