20122644959 has 2 divisors, whose sum is σ = 20122644960. Its totient is φ = 20122644958.

The previous prime is 20122644931. The next prime is 20122644967. The reversal of 20122644959 is 95944622102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20122644959 is a prime.

It is a super-2 number, since 2×20122644959² (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 (20122644359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061322479 + 10061322480.

It is an arithmetic number, because the mean of its divisors is an integer number (10061322480).

Almost surely, 2^20122644959 is an apocalyptic number.

20122644959 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122644959 is an equidigital number, since it uses as much as digits as its factorization.

20122644959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 20122644959 in words is "twenty billion, one hundred twenty-two million, six hundred forty-four thousand, nine hundred fifty-nine".