18996867 has 6 divisors (see below), whose sum is σ = 27439932. Its totient is φ = 12664572.

The previous prime is 18996851. The next prime is 18996869. The reversal of 18996867 is 76869981.

It is not a de Polignac number, because 18996867 - 2⁴ = 18996851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18996869) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1055373 + ... + 1055390.

It is an arithmetic number, because the mean of its divisors is an integer number (4573322).

Almost surely, 2^18996867 is an apocalyptic number.

18996867 is a deficient number, since it is larger than the sum of its proper divisors (8443065).

18996867 is a wasteful number, since it uses less digits than its factorization.

18996867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110769 (or 2110766 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 18996867 is about 4358.5395489774. The cubic root of 18996867 is about 266.8254972197.

The spelling of 18996867 in words is "eighteen million, nine hundred ninety-six thousand, eight hundred sixty-seven".