20442713 has 2 divisors, whose sum is σ = 20442714. Its totient is φ = 20442712.

The previous prime is 20442707. The next prime is 20442731. The reversal of 20442713 is 31724402.

Together with next prime (20442731) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18983449 + 1459264 = 4357^2 + 1208^2 .

It is a cyclic number.

It is not a de Polignac number, because 20442713 - 2⁶ = 20442649 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20442413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10221356 + 10221357.

It is an arithmetic number, because the mean of its divisors is an integer number (10221357).

Almost surely, 2^20442713 is an apocalyptic number.

It is an amenable number.

20442713 is a deficient number, since it is larger than the sum of its proper divisors (1).

20442713 is an equidigital number, since it uses as much as digits as its factorization.

20442713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 20442713 is about 4521.3618523626. The cubic root of 20442713 is about 273.4300092620.

The spelling of 20442713 in words is "twenty million, four hundred forty-two thousand, seven hundred thirteen".