20338837 has 2 divisors, whose sum is σ = 20338838. Its totient is φ = 20338836.

The previous prime is 20338807. The next prime is 20338841. The reversal of 20338837 is 73883302.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15437041 + 4901796 = 3929^2 + 2214^2 .

It is a cyclic number.

It is not a de Polignac number, because 20338837 - 2⁷ = 20338709 is a prime.

It is equal to p_1290697 and since 20338837 and 1290697 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20338807) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10169418 + 10169419.

It is an arithmetic number, because the mean of its divisors is an integer number (10169419).

Almost surely, 2^20338837 is an apocalyptic number.

It is an amenable number.

20338837 is a deficient number, since it is larger than the sum of its proper divisors (1).

20338837 is an equidigital number, since it uses as much as digits as its factorization.

20338837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 20338837 is about 4509.8599756533. The cubic root of 20338837 is about 272.9660939970.

The spelling of 20338837 in words is "twenty million, three hundred thirty-eight thousand, eight hundred thirty-seven".