11918388340 has 48 divisors (see below), whose sum is σ = 25854280704. Its totient is φ = 4610304000.

The previous prime is 11918388337. The next prime is 11918388439. The reversal of 11918388340 is 4388381911.

It is a happy number.

It is a congruent number.

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, 986617 + ... + 998623.

It is an arithmetic number, because the mean of its divisors is an integer number (538630848).

Almost surely, 2^11918388340 is an apocalyptic number.

11918388340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11918388340 is an abundant number, since it is smaller than the sum of its proper divisors (13935892364).

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

11918388340 is a wasteful number, since it uses less digits than its factorization.

11918388340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13648 (or 13646 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 46.

The spelling of 11918388340 in words is "eleven billion, nine hundred eighteen million, three hundred eighty-eight thousand, three hundred forty".