20337397 has 2 divisors, whose sum is σ = 20337398. Its totient is φ = 20337396.

The previous prime is 20337371. The next prime is 20337403. The reversal of 20337397 is 79373302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19236996 + 1100401 = 4386^2 + 1049^2 .

It is a cyclic number.

It is not a de Polignac number, because 20337397 - 2⁷ = 20337269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20337337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10168698 + 10168699.

It is an arithmetic number, because the mean of its divisors is an integer number (10168699).

Almost surely, 2^20337397 is an apocalyptic number.

It is an amenable number.

20337397 is a deficient number, since it is larger than the sum of its proper divisors (1).

20337397 is an equidigital number, since it uses as much as digits as its factorization.

20337397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23814, while the sum is 34.

The square root of 20337397 is about 4509.7003226379. The cubic root of 20337397 is about 272.9596517989.

The spelling of 20337397 in words is "twenty million, three hundred thirty-seven thousand, three hundred ninety-seven".