18917414248 has 32 divisors (see below), whose sum is σ = 36149405760. Its totient is φ = 9279290880.

The previous prime is 18917414221. The next prime is 18917414267. The reversal of 18917414248 is 84241471981.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19113 + ... + 195448.

It is an arithmetic number, because the mean of its divisors is an integer number (1129668930).

Almost surely, 2^18917414248 is an apocalyptic number.

It is an amenable number.

18917414248 is a deficient number, since it is larger than the sum of its proper divisors (17231991512).

18917414248 is a wasteful number, since it uses less digits than its factorization.

18917414248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214777 (or 214773 counting only the distinct ones).

The product of its digits is 516096, while the sum is 49.

The spelling of 18917414248 in words is "eighteen billion, nine hundred seventeen million, four hundred fourteen thousand, two hundred forty-eight".