20298613 has 2 divisors, whose sum is σ = 20298614. Its totient is φ = 20298612.

The previous prime is 20298611. The next prime is 20298643. The reversal of 20298613 is 31689202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18992164 + 1306449 = 4358^2 + 1143^2 .

It is a cyclic number.

It is not a de Polignac number, because 20298613 - 2¹ = 20298611 is a prime.

Together with 20298611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20298611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10149306 + 10149307.

It is an arithmetic number, because the mean of its divisors is an integer number (10149307).

Almost surely, 2^20298613 is an apocalyptic number.

It is an amenable number.

20298613 is a deficient number, since it is larger than the sum of its proper divisors (1).

20298613 is an equidigital number, since it uses as much as digits as its factorization.

20298613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 20298613 is about 4505.3982065962. The cubic root of 20298613 is about 272.7860274188.

The spelling of 20298613 in words is "twenty million, two hundred ninety-eight thousand, six hundred thirteen".