18669716 has 24 divisors (see below), whose sum is σ = 35938560. Its totient is φ = 8432352.

The previous prime is 18669713. The next prime is 18669731. The reversal of 18669716 is 61796681.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18669713) 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, 1376 + ... + 6263.

It is an arithmetic number, because the mean of its divisors is an integer number (1497440).

Almost surely, 2^18669716 is an apocalyptic number.

It is an amenable number.

18669716 is a deficient number, since it is larger than the sum of its proper divisors (17268844).

18669716 is a wasteful number, since it uses less digits than its factorization.

18669716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7703 (or 7701 counting only the distinct ones).

The product of its digits is 108864, while the sum is 44.

The square root of 18669716 is about 4320.8466762893. The cubic root of 18669716 is about 265.2849243492.

The spelling of 18669716 in words is "eighteen million, six hundred sixty-nine thousand, seven hundred sixteen".