22720452197 has 4 divisors (see below), whose sum is σ = 22804291776. Its totient is φ = 22636612620.

The previous prime is 22720452193. The next prime is 22720452217. The reversal of 22720452197 is 79125402722.

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, and also an emirpimes, since its reverse is a distinct semiprime: 79125402722 = 2 ⋅39562701361.

It is a cyclic number.

It is not a de Polignac number, because 22720452197 - 2² = 22720452193 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 (22720452191) 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, 41919383 + ... + 41919924.

It is an arithmetic number, because the mean of its divisors is an integer number (5701072944).

Almost surely, 2^22720452197 is an apocalyptic number.

It is an amenable number.

22720452197 is a deficient number, since it is larger than the sum of its proper divisors (83839579).

22720452197 is an equidigital number, since it uses as much as digits as its factorization.

22720452197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83839578.

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 22720452197 in words is "twenty-two billion, seven hundred twenty million, four hundred fifty-two thousand, one hundred ninety-seven".