18161935826 has 16 divisors (see below), whose sum is σ = 27553672800. Its totient is φ = 8977725120.

The previous prime is 18161935789. The next prime is 18161935829. The reversal of 18161935826 is 62853916181.

It is not an unprimeable number, because it can be changed into a prime (18161935829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18650 + ... + 191498.

It is an arithmetic number, because the mean of its divisors is an integer number (1722104550).

Almost surely, 2^18161935826 is an apocalyptic number.

18161935826 is a deficient number, since it is larger than the sum of its proper divisors (9391736974).

18161935826 is a wasteful number, since it uses less digits than its factorization.

18161935826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173449.

The product of its digits is 622080, while the sum is 50.

The spelling of 18161935826 in words is "eighteen billion, one hundred sixty-one million, nine hundred thirty-five thousand, eight hundred twenty-six".