20958713 has 2 divisors, whose sum is σ = 20958714. Its totient is φ = 20958712.

The previous prime is 20958689. The next prime is 20958719. The reversal of 20958713 is 31785902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13630864 + 7327849 = 3692^2 + 2707^2 .

It is a cyclic number.

It is not a de Polignac number, because 20958713 - 2¹⁰ = 20957689 is a prime.

It is not a weakly prime, because it can be changed into another prime (20958719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10479356 + 10479357.

It is an arithmetic number, because the mean of its divisors is an integer number (10479357).

Almost surely, 2^20958713 is an apocalyptic number.

It is an amenable number.

20958713 is a deficient number, since it is larger than the sum of its proper divisors (1).

20958713 is an equidigital number, since it uses as much as digits as its factorization.

20958713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 20958713 is about 4578.0686976060. The cubic root of 20958713 is about 275.7114931406.

The spelling of 20958713 in words is "twenty million, nine hundred fifty-eight thousand, seven hundred thirteen".