22297374821 has 4 divisors (see below), whose sum is σ = 22394743500. Its totient is φ = 22200006144.

The previous prime is 22297374767. The next prime is 22297374823. The reversal of 22297374821 is 12847379222.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8953890625 + 13343484196 = 94625^2 + 115514^2 .

It is a cyclic number.

It is not a de Polignac number, because 22297374821 - 2²² = 22293180517 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 (22297374823) 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, 48683996 + ... + 48684453.

It is an arithmetic number, because the mean of its divisors is an integer number (5598685875).

Almost surely, 2^22297374821 is an apocalyptic number.

It is an amenable number.

22297374821 is a deficient number, since it is larger than the sum of its proper divisors (97368679).

22297374821 is an equidigital number, since it uses as much as digits as its factorization.

22297374821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97368678.

The product of its digits is 677376, while the sum is 47.

The spelling of 22297374821 in words is "twenty-two billion, two hundred ninety-seven million, three hundred seventy-four thousand, eight hundred twenty-one".