22837945721 has 2 divisors, whose sum is σ = 22837945722. Its totient is φ = 22837945720.

The previous prime is 22837945709. The next prime is 22837945723. The reversal of 22837945721 is 12754973822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22645735225 + 192210496 = 150485^2 + 13864^2 .

It is a cyclic number.

It is not a de Polignac number, because 22837945721 - 2¹⁰ = 22837944697 is a prime.

Together with 22837945723, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22837945721.

It is not a weakly prime, because it can be changed into another prime (22837945723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11418972860 + 11418972861.

It is an arithmetic number, because the mean of its divisors is an integer number (11418972861).

Almost surely, 2^22837945721 is an apocalyptic number.

It is an amenable number.

22837945721 is a deficient number, since it is larger than the sum of its proper divisors (1).

22837945721 is an equidigital number, since it uses as much as digits as its factorization.

22837945721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 50.

The spelling of 22837945721 in words is "twenty-two billion, eight hundred thirty-seven million, nine hundred forty-five thousand, seven hundred twenty-one".