11989218431 has 8 divisors (see below), whose sum is σ = 12717024624. Its totient is φ = 11263918720.

The previous prime is 11989218427. The next prime is 11989218463. The reversal of 11989218431 is 13481298911.

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

It is a cyclic number.

It is not a de Polignac number, because 11989218431 - 2² = 11989218427 is a prime.

It is a super-2 number, since 2×11989218431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11989218421) 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, 616760 + ... + 635901.

It is an arithmetic number, because the mean of its divisors is an integer number (1589628078).

Almost surely, 2^11989218431 is an apocalyptic number.

11989218431 is a deficient number, since it is larger than the sum of its proper divisors (727806193).

11989218431 is a wasteful number, since it uses less digits than its factorization.

11989218431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253241.

The product of its digits is 124416, while the sum is 47.

The spelling of 11989218431 in words is "eleven billion, nine hundred eighty-nine million, two hundred eighteen thousand, four hundred thirty-one".