20244422981 has 2 divisors, whose sum is σ = 20244422982. Its totient is φ = 20244422980.

The previous prime is 20244422971. The next prime is 20244423011. The reversal of 20244422981 is 18922444202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17780889025 + 2463533956 = 133345^2 + 49634^2 .

It is a cyclic number.

It is not a de Polignac number, because 20244422981 - 2¹⁴ = 20244406597 is a prime.

It is a super-2 number, since 2×20244422981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20244422911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10122211490 + 10122211491.

It is an arithmetic number, because the mean of its divisors is an integer number (10122211491).

Almost surely, 2^20244422981 is an apocalyptic number.

It is an amenable number.

20244422981 is a deficient number, since it is larger than the sum of its proper divisors (1).

20244422981 is an equidigital number, since it uses as much as digits as its factorization.

20244422981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73728, while the sum is 38.

The spelling of 20244422981 in words is "twenty billion, two hundred forty-four million, four hundred twenty-two thousand, nine hundred eighty-one".