18402345 has 48 divisors (see below), whose sum is σ = 34856640. Its totient is φ = 8926848.

The previous prime is 18402337. The next prime is 18402353. The reversal of 18402345 is 54320481.

It is an interprime number because it is at equal distance from previous prime (18402337) and next prime (18402353).

It is not a de Polignac number, because 18402345 - 2³ = 18402337 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 48366 + ... + 48744.

It is an arithmetic number, because the mean of its divisors is an integer number (726180).

Almost surely, 2^18402345 is an apocalyptic number.

18402345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18402345 is a deficient number, since it is larger than the sum of its proper divisors (16454295).

18402345 is a wasteful number, since it uses less digits than its factorization.

18402345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486 (or 483 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 18402345 is about 4289.7954496689. The cubic root of 18402345 is about 264.0124391522.

The spelling of 18402345 in words is "eighteen million, four hundred two thousand, three hundred forty-five".