18664793 has 16 divisors (see below), whose sum is σ = 22932864. Its totient is φ = 14826240.

The previous prime is 18664787. The next prime is 18664801. The reversal of 18664793 is 39746681.

It is a cyclic number.

It is not a de Polignac number, because 18664793 - 2⁶ = 18664729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18664703) 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 15 ways as a sum of consecutive naturals, for example, 6803 + ... + 9143.

It is an arithmetic number, because the mean of its divisors is an integer number (1433304).

Almost surely, 2^18664793 is an apocalyptic number.

It is an amenable number.

18664793 is a deficient number, since it is larger than the sum of its proper divisors (4268071).

18664793 is a wasteful number, since it uses less digits than its factorization.

18664793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2432.

The product of its digits is 217728, while the sum is 44.

The square root of 18664793 is about 4320.2769587146. The cubic root of 18664793 is about 265.2616047213.

The spelling of 18664793 in words is "eighteen million, six hundred sixty-four thousand, seven hundred ninety-three".