18441718464 has 112 divisors (see below), whose sum is σ = 54242370560. Its totient is φ = 5491307520.

The previous prime is 18441718453. The next prime is 18441718501. The reversal of 18441718464 is 46481714481.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 41794 + ... + 196545.

It is an arithmetic number, because the mean of its divisors is an integer number (484306880).

Almost surely, 2^18441718464 is an apocalyptic number.

It is an amenable number.

18441718464 is an abundant number, since it is smaller than the sum of its proper divisors (35800652096).

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

18441718464 is a wasteful number, since it uses less digits than its factorization.

18441718464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238398 (or 238388 counting only the distinct ones).

The product of its digits is 688128, while the sum is 48.

The spelling of 18441718464 in words is "eighteen billion, four hundred forty-one million, seven hundred eighteen thousand, four hundred sixty-four".