11918443669 has 8 divisors (see below), whose sum is σ = 13567240512. Its totient is φ = 10363863840.

The previous prime is 11918443631. The next prime is 11918443679. The reversal of 11918443669 is 96634481911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11918443669 - 2²³ = 11910055061 is a prime.

It is a super-2 number, since 2×11918443669² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11918443679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23553984 + ... + 23554489.

It is an arithmetic number, because the mean of its divisors is an integer number (1695905064).

Almost surely, 2^11918443669 is an apocalyptic number.

It is an amenable number.

11918443669 is a deficient number, since it is larger than the sum of its proper divisors (1648796843).

11918443669 is a wasteful number, since it uses less digits than its factorization.

11918443669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47108507.

The product of its digits is 1119744, while the sum is 52.

The spelling of 11918443669 in words is "eleven billion, nine hundred eighteen million, four hundred forty-three thousand, six hundred sixty-nine".