22721058491 has 4 divisors (see below), whose sum is σ = 22815336984. Its totient is φ = 22626780000.

The previous prime is 22721058469. The next prime is 22721058497. The reversal of 22721058491 is 19485012722.

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

It is a cyclic number.

It is not a de Polignac number, because 22721058491 - 2¹⁰ = 22721057467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22721058497) 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, 47138885 + ... + 47139366.

It is an arithmetic number, because the mean of its divisors is an integer number (5703834246).

Almost surely, 2^22721058491 is an apocalyptic number.

22721058491 is a deficient number, since it is larger than the sum of its proper divisors (94278493).

22721058491 is an equidigital number, since it uses as much as digits as its factorization.

22721058491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94278492.

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 22721058491 in words is "twenty-two billion, seven hundred twenty-one million, fifty-eight thousand, four hundred ninety-one".