22981840897 has 4 divisors (see below), whose sum is σ = 23001808896. Its totient is φ = 22961872900.

The previous prime is 22981840873. The next prime is 22981840919. The reversal of 22981840897 is 79804818922.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22981840897 is a prime.

It is a super-2 number, since 2×22981840897² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22981840837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9982273 + ... + 9984574.

It is an arithmetic number, because the mean of its divisors is an integer number (5750452224).

Almost surely, 2^22981840897 is an apocalyptic number.

It is an amenable number.

22981840897 is a deficient number, since it is larger than the sum of its proper divisors (19967999).

22981840897 is a wasteful number, since it uses less digits than its factorization.

22981840897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19967998.

The product of its (nonzero) digits is 4644864, while the sum is 58.

The spelling of 22981840897 in words is "twenty-two billion, nine hundred eighty-one million, eight hundred forty thousand, eight hundred ninety-seven".