11918047408 has 40 divisors (see below), whose sum is σ = 23897443680. Its totient is φ = 5751137280.

The previous prime is 11918047397. The next prime is 11918047423. The reversal of 11918047408 is 80474081911.

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, 1670088 + ... + 1677208.

It is an arithmetic number, because the mean of its divisors is an integer number (597436092).

Almost surely, 2^11918047408 is an apocalyptic number.

It is an amenable number.

11918047408 is an abundant number, since it is smaller than the sum of its proper divisors (11979396272).

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

11918047408 is a wasteful number, since it uses less digits than its factorization.

11918047408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10765 (or 10759 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 43.

The spelling of 11918047408 in words is "eleven billion, nine hundred eighteen million, forty-seven thousand, four hundred eight".