20368637 has 2 divisors, whose sum is σ = 20368638. Its totient is φ = 20368636.

The previous prime is 20368633. The next prime is 20368651. The reversal of 20368637 is 73686302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18783556 + 1585081 = 4334^2 + 1259^2 .

It is a cyclic number.

It is not a de Polignac number, because 20368637 - 2² = 20368633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20368597 and 20368606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20368633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10184318 + 10184319.

It is an arithmetic number, because the mean of its divisors is an integer number (10184319).

Almost surely, 2^20368637 is an apocalyptic number.

It is an amenable number.

20368637 is a deficient number, since it is larger than the sum of its proper divisors (1).

20368637 is an equidigital number, since it uses as much as digits as its factorization.

20368637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 20368637 is about 4513.1626383280. The cubic root of 20368637 is about 273.0993435048.

The spelling of 20368637 in words is "twenty million, three hundred sixty-eight thousand, six hundred thirty-seven".