18724268806 has 16 divisors (see below), whose sum is σ = 28695259584. Its totient is φ = 9159338944.

The previous prime is 18724268791. The next prime is 18724268821. The reversal of 18724268806 is 60886242781.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18724268791) and next prime (18724268821).

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, 209676 + ... + 285328.

It is an arithmetic number, because the mean of its divisors is an integer number (1793453724).

Almost surely, 2^18724268806 is an apocalyptic number.

18724268806 is a deficient number, since it is larger than the sum of its proper divisors (9970990778).

18724268806 is a wasteful number, since it uses less digits than its factorization.

18724268806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78335.

The product of its (nonzero) digits is 2064384, while the sum is 52.

The spelling of 18724268806 in words is "eighteen billion, seven hundred twenty-four million, two hundred sixty-eight thousand, eight hundred six".