18992668 has 12 divisors (see below), whose sum is σ = 33371352. Its totient is φ = 9458000.

The previous prime is 18992657. The next prime is 18992669. The reversal of 18992668 is 86629981.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18992669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8455 + ... + 10462.

It is an arithmetic number, because the mean of its divisors is an integer number (2780946).

Almost surely, 2^18992668 is an apocalyptic number.

It is an amenable number.

18992668 is a deficient number, since it is larger than the sum of its proper divisors (14378684).

18992668 is a wasteful number, since it uses less digits than its factorization.

18992668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19172 (or 19170 counting only the distinct ones).

The product of its digits is 373248, while the sum is 49.

The square root of 18992668 is about 4358.0578243066. The cubic root of 18992668 is about 266.8058363844.

The spelling of 18992668 in words is "eighteen million, nine hundred ninety-two thousand, six hundred sixty-eight".