18044040786 has 32 divisors (see below), whose sum is σ = 37423321728. Its totient is φ = 5795297280.

The previous prime is 18044040779. The next prime is 18044040803. The reversal of 18044040786 is 68704044081.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371695 + ... + 417426.

It is an arithmetic number, because the mean of its divisors is an integer number (1169478804).

Almost surely, 2^18044040786 is an apocalyptic number.

18044040786 is an abundant number, since it is smaller than the sum of its proper divisors (19379280942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18044040786 is a wasteful number, since it uses less digits than its factorization.

18044040786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 789266.

The product of its (nonzero) digits is 172032, while the sum is 42.

The spelling of 18044040786 in words is "eighteen billion, forty-four million, forty thousand, seven hundred eighty-six".