22621648897 has 4 divisors (see below), whose sum is σ = 22720433620. Its totient is φ = 22522864176.

The previous prime is 22621648831. The next prime is 22621648901. The reversal of 22621648897 is 79884612622.

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 14332638961 + 8289009936 = 119719^2 + 91044^2 .

It is a cyclic number.

It is not a de Polignac number, because 22621648897 - 2⁷ = 22621648769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22621648297) 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, 49392018 + ... + 49392475.

It is an arithmetic number, because the mean of its divisors is an integer number (5680108405).

Almost surely, 2^22621648897 is an apocalyptic number.

It is an amenable number.

22621648897 is a deficient number, since it is larger than the sum of its proper divisors (98784723).

22621648897 is an equidigital number, since it uses as much as digits as its factorization.

22621648897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98784722.

The product of its digits is 4644864, while the sum is 55.

The spelling of 22621648897 in words is "twenty-two billion, six hundred twenty-one million, six hundred forty-eight thousand, eight hundred ninety-seven".