18032344436 has 12 divisors (see below), whose sum is σ = 31585065540. Its totient is φ = 9008040000.

The previous prime is 18032344417. The next prime is 18032344511. The reversal of 18032344436 is 63444323081.

It can be written as a sum of positive squares in 2 ways, for example, as 5306248336 + 12726096100 = 72844^2 + 112810^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18032344436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2028065 + ... + 2036936.

It is an arithmetic number, because the mean of its divisors is an integer number (2632088795).

Almost surely, 2^18032344436 is an apocalyptic number.

It is an amenable number.

18032344436 is a deficient number, since it is larger than the sum of its proper divisors (13552721104).

18032344436 is a wasteful number, since it uses less digits than its factorization.

18032344436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4066114 (or 4066112 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 38.

The spelling of 18032344436 in words is "eighteen billion, thirty-two million, three hundred forty-four thousand, four hundred thirty-six".