18968479 has 8 divisors (see below), whose sum is σ = 20007680. Its totient is φ = 17933400.

The previous prime is 18968471. The next prime is 18968489. The reversal of 18968479 is 97486981.

It is a happy number.

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 18968479 - 2³ = 18968471 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 (18968471) 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, 14794 + ... + 16024.

It is an arithmetic number, because the mean of its divisors is an integer number (2500960).

Almost surely, 2^18968479 is an apocalyptic number.

18968479 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

18968479 is a deficient number, since it is larger than the sum of its proper divisors (1039201).

18968479 is a wasteful number, since it uses less digits than its factorization.

18968479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2061.

The product of its digits is 870912, while the sum is 52.

The square root of 18968479 is about 4355.2817360074. The cubic root of 18968479 is about 266.6925205836.

The spelling of 18968479 in words is "eighteen million, nine hundred sixty-eight thousand, four hundred seventy-nine".