18440414872 has 32 divisors (see below), whose sum is σ = 37813165200. Its totient is φ = 8361088000.

The previous prime is 18440414827. The next prime is 18440414873. The reversal of 18440414872 is 27841404481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18440414873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225997 + ... + 296572.

Almost surely, 2^18440414872 is an apocalyptic number.

It is an amenable number.

18440414872 is an abundant number, since it is smaller than the sum of its proper divisors (19372750328).

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

18440414872 is a wasteful number, since it uses less digits than its factorization.

18440414872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522987 (or 522983 counting only the distinct ones).

The product of its (nonzero) digits is 229376, while the sum is 43.

The spelling of 18440414872 in words is "eighteen billion, four hundred forty million, four hundred fourteen thousand, eight hundred seventy-two".