20240996917 has 2 divisors, whose sum is σ = 20240996918. Its totient is φ = 20240996916.

The previous prime is 20240996833. The next prime is 20240996947. The reversal of 20240996917 is 71969904202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11391079441 + 8849917476 = 106729^2 + 94074^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20240996917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20240996947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10120498458 + 10120498459.

It is an arithmetic number, because the mean of its divisors is an integer number (10120498459).

Almost surely, 2^20240996917 is an apocalyptic number.

It is an amenable number.

20240996917 is a deficient number, since it is larger than the sum of its proper divisors (1).

20240996917 is an equidigital number, since it uses as much as digits as its factorization.

20240996917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 49.

The spelling of 20240996917 in words is "twenty billion, two hundred forty million, nine hundred ninety-six thousand, nine hundred seventeen".