20382613 has 2 divisors, whose sum is σ = 20382614. Its totient is φ = 20382612.

The previous prime is 20382599. The next prime is 20382619. The reversal of 20382613 is 31628302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19731364 + 651249 = 4442^2 + 807^2 .

It is a cyclic number.

It is not a de Polignac number, because 20382613 - 2⁹ = 20382101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20382619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10191306 + 10191307.

It is an arithmetic number, because the mean of its divisors is an integer number (10191307).

Almost surely, 2^20382613 is an apocalyptic number.

It is an amenable number.

20382613 is a deficient number, since it is larger than the sum of its proper divisors (1).

20382613 is an equidigital number, since it uses as much as digits as its factorization.

20382613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 20382613 is about 4514.7107327048. The cubic root of 20382613 is about 273.1617918623.

The spelling of 20382613 in words is "twenty million, three hundred eighty-two thousand, six hundred thirteen".