20286613 has 2 divisors, whose sum is σ = 20286614. Its totient is φ = 20286612.

The previous prime is 20286601. The next prime is 20286653. The reversal of 20286613 is 31668202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20277009 + 9604 = 4503^2 + 98^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20286613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20286653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10143306 + 10143307.

It is an arithmetic number, because the mean of its divisors is an integer number (10143307).

Almost surely, 2^20286613 is an apocalyptic number.

It is an amenable number.

20286613 is a deficient number, since it is larger than the sum of its proper divisors (1).

20286613 is an equidigital number, since it uses as much as digits as its factorization.

20286613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 20286613 is about 4504.0662739351. The cubic root of 20286613 is about 272.7322622084.

The spelling of 20286613 in words is "twenty million, two hundred eighty-six thousand, six hundred thirteen".