18044021442 has 32 divisors (see below), whose sum is σ = 38243316672. Its totient is φ = 5656062464.

The previous prime is 18044021423. The next prime is 18044021447. The reversal of 18044021442 is 24412044081.

It is not an unprimeable number, because it can be changed into a prime (18044021447) 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, 46558 + ... + 195590.

It is an arithmetic number, because the mean of its divisors is an integer number (1195103646).

Almost surely, 2^18044021442 is an apocalyptic number.

18044021442 is an abundant number, since it is smaller than the sum of its proper divisors (20199295230).

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

18044021442 is a wasteful number, since it uses less digits than its factorization.

18044021442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150242.

The product of its (nonzero) digits is 8192, while the sum is 30.

The spelling of 18044021442 in words is "eighteen billion, forty-four million, twenty-one thousand, four hundred forty-two".