18979712 has 16 divisors (see below), whose sum is σ = 37811400. Its totient is φ = 9489792.

The previous prime is 18979703. The next prime is 18979721. The reversal of 18979712 is 21797981.

It is an interprime number because it is at equal distance from previous prime (18979703) and next prime (18979721).

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74012 + ... + 74267.

Almost surely, 2^18979712 is an apocalyptic number.

It is an amenable number.

18979712 is a deficient number, since it is larger than the sum of its proper divisors (18831688).

18979712 is an equidigital number, since it uses as much as digits as its factorization.

18979712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148293 (or 148281 counting only the distinct ones).

The product of its digits is 63504, while the sum is 44.

The square root of 18979712 is about 4356.5711287663. The cubic root of 18979712 is about 266.7451546741.

It can be divided in two parts, 18979 and 712, that added together give a palindrome (19691).

The spelling of 18979712 in words is "eighteen million, nine hundred seventy-nine thousand, seven hundred twelve".