22972413991 has 4 divisors (see below), whose sum is σ = 23361777000. Its totient is φ = 22583050984.

The previous prime is 22972413967. The next prime is 22972414001. The reversal of 22972413991 is 19931427922.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 22972413991 - 2²⁷ = 22838196263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22972413901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194681416 + ... + 194681533.

It is an arithmetic number, because the mean of its divisors is an integer number (5840444250).

Almost surely, 2^22972413991 is an apocalyptic number.

22972413991 is a deficient number, since it is larger than the sum of its proper divisors (389363009).

22972413991 is an equidigital number, since it uses as much as digits as its factorization.

22972413991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389363008.

The product of its digits is 489888, while the sum is 49.

The spelling of 22972413991 in words is "twenty-two billion, nine hundred seventy-two million, four hundred thirteen thousand, nine hundred ninety-one".