18734479 has 4 divisors (see below), whose sum is σ = 18823480. Its totient is φ = 18645480.

The previous prime is 18734477. The next prime is 18734491. The reversal of 18734479 is 97443781.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18734479 - 2¹ = 18734477 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 (18734477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44184 + ... + 44605.

It is an arithmetic number, because the mean of its divisors is an integer number (4705870).

Almost surely, 2^18734479 is an apocalyptic number.

18734479 is a deficient number, since it is larger than the sum of its proper divisors (89001).

18734479 is an equidigital number, since it uses as much as digits as its factorization.

18734479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89000.

The product of its digits is 169344, while the sum is 43.

The square root of 18734479 is about 4328.3344371710. The cubic root of 18734479 is about 265.5913175099.

The spelling of 18734479 in words is "eighteen million, seven hundred thirty-four thousand, four hundred seventy-nine".