20221626637 has 2 divisors, whose sum is σ = 20221626638. Its totient is φ = 20221626636.

The previous prime is 20221626619. The next prime is 20221626643. The reversal of 20221626637 is 73662612202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14117954761 + 6103671876 = 118819^2 + 78126^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20221626637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20221626596 and 20221626605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20221626037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110813318 + 10110813319.

It is an arithmetic number, because the mean of its divisors is an integer number (10110813319).

Almost surely, 2^20221626637 is an apocalyptic number.

It is an amenable number.

20221626637 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221626637 is an equidigital number, since it uses as much as digits as its factorization.

20221626637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 37.

The spelling of 20221626637 in words is "twenty billion, two hundred twenty-one million, six hundred twenty-six thousand, six hundred thirty-seven".