22801987309 has 2 divisors, whose sum is σ = 22801987310. Its totient is φ = 22801987308.

The previous prime is 22801987291. The next prime is 22801987339. The reversal of 22801987309 is 90378910822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22739735209 + 62252100 = 150797^2 + 7890^2 .

It is a cyclic number.

It is not a de Polignac number, because 22801987309 - 2⁵ = 22801987277 is a prime.

It is a super-2 number, since 2×22801987309² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22801987339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11400993654 + 11400993655.

It is an arithmetic number, because the mean of its divisors is an integer number (11400993655).

Almost surely, 2^22801987309 is an apocalyptic number.

It is an amenable number.

22801987309 is a deficient number, since it is larger than the sum of its proper divisors (1).

22801987309 is an equidigital number, since it uses as much as digits as its factorization.

22801987309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 49.

The spelling of 22801987309 in words is "twenty-two billion, eight hundred one million, nine hundred eighty-seven thousand, three hundred nine".