18664532246 has 16 divisors (see below), whose sum is σ = 29216968704. Its totient is φ = 8925623784.

The previous prime is 18664532239. The next prime is 18664532251. The reversal of 18664532246 is 64223546681.

It is a self number, because there is not a number n which added to its sum of digits gives 18664532246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 818921 + ... + 841403.

It is an arithmetic number, because the mean of its divisors is an integer number (1826060544).

Almost surely, 2^18664532246 is an apocalyptic number.

18664532246 is a deficient number, since it is larger than the sum of its proper divisors (10552436458).

18664532246 is a wasteful number, since it uses less digits than its factorization.

18664532246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40555.

The product of its digits is 1658880, while the sum is 47.

The spelling of 18664532246 in words is "eighteen billion, six hundred sixty-four million, five hundred thirty-two thousand, two hundred forty-six".