18444033901 has 16 divisors (see below), whose sum is σ = 19215187200. Its totient is φ = 17682336000.

The previous prime is 18444033889. The next prime is 18444033929. The reversal of 18444033901 is 10933044481.

It is a cyclic number.

It is not a de Polignac number, because 18444033901 - 2⁵ = 18444033869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18444033961) 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, 2505376 + ... + 2512726.

It is an arithmetic number, because the mean of its divisors is an integer number (1200949200).

Almost surely, 2^18444033901 is an apocalyptic number.

It is an amenable number.

18444033901 is a deficient number, since it is larger than the sum of its proper divisors (771153299).

18444033901 is a wasteful number, since it uses less digits than its factorization.

18444033901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7980.

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 18444033901 in words is "eighteen billion, four hundred forty-four million, thirty-three thousand, nine hundred one".