22174426621 has 2 divisors, whose sum is σ = 22174426622. Its totient is φ = 22174426620.

The previous prime is 22174426619. The next prime is 22174426649. The reversal of 22174426621 is 12662447122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21349300996 + 825125625 = 146114^2 + 28725^2 .

It is a cyclic number.

It is not a de Polignac number, because 22174426621 - 2¹ = 22174426619 is a prime.

It is a super-2 number, since 2×22174426621² (a number of 21 digits) contains 22 as substring.

Together with 22174426619, 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 (22174426321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11087213310 + 11087213311.

It is an arithmetic number, because the mean of its divisors is an integer number (11087213311).

Almost surely, 2^22174426621 is an apocalyptic number.

It is an amenable number.

22174426621 is a deficient number, since it is larger than the sum of its proper divisors (1).

22174426621 is an equidigital number, since it uses as much as digits as its factorization.

22174426621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 37.

The spelling of 22174426621 in words is "twenty-two billion, one hundred seventy-four million, four hundred twenty-six thousand, six hundred twenty-one".