20297424613 has 2 divisors, whose sum is σ = 20297424614. Its totient is φ = 20297424612.

The previous prime is 20297424541. The next prime is 20297424643. The reversal of 20297424613 is 31642479202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18165109284 + 2132315329 = 134778^2 + 46177^2 .

It is a cyclic number.

It is not a de Polignac number, because 20297424613 - 2²⁵ = 20263870181 is a prime.

It is a super-3 number, since 3×20297424613³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20297424643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10148712306 + 10148712307.

It is an arithmetic number, because the mean of its divisors is an integer number (10148712307).

Almost surely, 2^20297424613 is an apocalyptic number.

It is an amenable number.

20297424613 is a deficient number, since it is larger than the sum of its proper divisors (1).

20297424613 is an equidigital number, since it uses as much as digits as its factorization.

20297424613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 20297424613 in words is "twenty billion, two hundred ninety-seven million, four hundred twenty-four thousand, six hundred thirteen".