20799937 has 2 divisors, whose sum is σ = 20799938. Its totient is φ = 20799936.

The previous prime is 20799913. The next prime is 20799943. The reversal of 20799937 is 73999702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18974736 + 1825201 = 4356^2 + 1351^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20799937 is a prime.

It is not a weakly prime, because it can be changed into another prime (20799967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10399968 + 10399969.

It is an arithmetic number, because the mean of its divisors is an integer number (10399969).

Almost surely, 2^20799937 is an apocalyptic number.

It is an amenable number.

20799937 is a deficient number, since it is larger than the sum of its proper divisors (1).

20799937 is an equidigital number, since it uses as much as digits as its factorization.

20799937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 214326, while the sum is 46.

The square root of 20799937 is about 4560.6947935594. The cubic root of 20799937 is about 275.0134957564.

It can be divided in two parts, 20799 and 937, that added together give a triangular number (21736 = T₂₀₈).

The spelling of 20799937 in words is "twenty million, seven hundred ninety-nine thousand, nine hundred thirty-seven".