18890667 has 12 divisors (see below), whose sum is σ = 27471600. Its totient is φ = 12508368.

The previous prime is 18890611. The next prime is 18890671. The reversal of 18890667 is 76609881.

It is a happy number.

It is not a de Polignac number, because 18890667 - 2⁶ = 18890603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18890167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5703 + ... + 8384.

It is an arithmetic number, because the mean of its divisors is an integer number (2289300).

Almost surely, 2^18890667 is an apocalyptic number.

18890667 is a deficient number, since it is larger than the sum of its proper divisors (8580933).

18890667 is a wasteful number, since it uses less digits than its factorization.

18890667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14242 (or 14239 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 18890667 is about 4346.3394943331. The cubic root of 18890667 is about 266.3273477585.

The spelling of 18890667 in words is "eighteen million, eight hundred ninety thousand, six hundred sixty-seven".