18712345 has 8 divisors (see below), whose sum is σ = 22932864. Its totient is φ = 14651184.

The previous prime is 18712327. The next prime is 18712361. The reversal of 18712345 is 54321781.

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 18712345 - 2¹¹ = 18710297 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39579 + ... + 40048.

It is an arithmetic number, because the mean of its divisors is an integer number (2866608).

Almost surely, 2^18712345 is an apocalyptic number.

It is an amenable number.

18712345 is a deficient number, since it is larger than the sum of its proper divisors (4220519).

18712345 is an equidigital number, since it uses as much as digits as its factorization.

18712345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79679.

The product of its digits is 6720, while the sum is 31.

The square root of 18712345 is about 4325.7768088518. The cubic root of 18712345 is about 265.4866812962.

Subtracting from 18712345 its product of digits (6720), we obtain a square (18705625 = 4325²).

The spelling of 18712345 in words is "eighteen million, seven hundred twelve thousand, three hundred forty-five".