18642479 has 8 divisors (see below), whose sum is σ = 18984240. Its totient is φ = 18304000.

The previous prime is 18642469. The next prime is 18642493. The reversal of 18642479 is 97424681.

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 18642479 - 2⁸ = 18642223 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 (18642469) 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, 12527 + ... + 13935.

It is an arithmetic number, because the mean of its divisors is an integer number (2373030).

Almost surely, 2^18642479 is an apocalyptic number.

18642479 is a deficient number, since it is larger than the sum of its proper divisors (341761).

18642479 is a wasteful number, since it uses less digits than its factorization.

18642479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641.

The product of its digits is 96768, while the sum is 41.

The square root of 18642479 is about 4317.6937130834. The cubic root of 18642479 is about 265.1558546820.

The spelling of 18642479 in words is "eighteen million, six hundred forty-two thousand, four hundred seventy-nine".