20707937 has 2 divisors, whose sum is σ = 20707938. Its totient is φ = 20707936.

The previous prime is 20707933. The next prime is 20707949. The reversal of 20707937 is 73970702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15649936 + 5058001 = 3956^2 + 2249^2 .

It is a cyclic number.

It is not a de Polignac number, because 20707937 - 2² = 20707933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20707897 and 20707906.

It is not a weakly prime, because it can be changed into another prime (20707933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10353968 + 10353969.

It is an arithmetic number, because the mean of its divisors is an integer number (10353969).

Almost surely, 2^20707937 is an apocalyptic number.

It is an amenable number.

20707937 is a deficient number, since it is larger than the sum of its proper divisors (1).

20707937 is an equidigital number, since it uses as much as digits as its factorization.

20707937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18522, while the sum is 35.

The square root of 20707937 is about 4550.5974333048. The cubic root of 20707937 is about 274.6074266295.

The spelling of 20707937 in words is "twenty million, seven hundred seven thousand, nine hundred thirty-seven".