11719401918 has 32 divisors (see below), whose sum is σ = 26801640960. Its totient is φ = 3346596000.

The previous prime is 11719401907. The next prime is 11719401931. The reversal of 11719401918 is 81910491711.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11719401918.

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, 4668 + ... + 153168.

It is an arithmetic number, because the mean of its divisors is an integer number (837551280).

Almost surely, 2^11719401918 is an apocalyptic number.

11719401918 is an abundant number, since it is smaller than the sum of its proper divisors (15082239042).

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

11719401918 is a wasteful number, since it uses less digits than its factorization.

11719401918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150392.

The product of its (nonzero) digits is 18144, while the sum is 42.

The spelling of 11719401918 in words is "eleven billion, seven hundred nineteen million, four hundred one thousand, nine hundred eighteen".