22621270549 has 2 divisors, whose sum is σ = 22621270550. Its totient is φ = 22621270548.

The previous prime is 22621270547. The next prime is 22621270579. The reversal of 22621270549 is 94507212622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22117043524 + 504227025 = 148718^2 + 22455^2 .

It is a cyclic number.

It is not a de Polignac number, because 22621270549 - 2¹ = 22621270547 is a prime.

It is a super-2 number, since 2×22621270549² (a number of 22 digits) contains 22 as substring.

Together with 22621270547, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22621270547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11310635274 + 11310635275.

It is an arithmetic number, because the mean of its divisors is an integer number (11310635275).

Almost surely, 2^22621270549 is an apocalyptic number.

It is an amenable number.

22621270549 is a deficient number, since it is larger than the sum of its proper divisors (1).

22621270549 is an equidigital number, since it uses as much as digits as its factorization.

22621270549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 22621270549 in words is "twenty-two billion, six hundred twenty-one million, two hundred seventy thousand, five hundred forty-nine".