20122645013 has 2 divisors, whose sum is σ = 20122645014. Its totient is φ = 20122645012.

The previous prime is 20122644967. The next prime is 20122645033. The reversal of 20122645013 is 31054622102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16406279569 + 3716365444 = 128087^2 + 60962^2 .

It is a cyclic number.

It is not a de Polignac number, because 20122645013 - 2¹² = 20122640917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20122645033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10061322506 + 10061322507.

It is an arithmetic number, because the mean of its divisors is an integer number (10061322507).

Almost surely, 2^20122645013 is an apocalyptic number.

It is an amenable number.

20122645013 is a deficient number, since it is larger than the sum of its proper divisors (1).

20122645013 is an equidigital number, since it uses as much as digits as its factorization.

20122645013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

The spelling of 20122645013 in words is "twenty billion, one hundred twenty-two million, six hundred forty-five thousand, thirteen".