18696544426 has 32 divisors (see below), whose sum is σ = 33748364160. Its totient is φ = 7588774656.

The previous prime is 18696544421. The next prime is 18696544429. The reversal of 18696544426 is 62444569681.

It is a happy number.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (18696544421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1074790 + ... + 1092046.

It is an arithmetic number, because the mean of its divisors is an integer number (1054636380).

Almost surely, 2^18696544426 is an apocalyptic number.

18696544426 is a deficient number, since it is larger than the sum of its proper divisors (15051819734).

18696544426 is a wasteful number, since it uses less digits than its factorization.

18696544426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21358.

The product of its digits is 9953280, while the sum is 55.

The spelling of 18696544426 in words is "eighteen billion, six hundred ninety-six million, five hundred forty-four thousand, four hundred twenty-six".