20707801 has 2 divisors, whose sum is σ = 20707802. Its totient is φ = 20707800.

The previous prime is 20707781. The next prime is 20707807. The reversal of 20707801 is 10870702.

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., 20693401 + 14400 = 4549^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 20707801 - 2¹¹ = 20705753 is a prime.

It is not a weakly prime, because it can be changed into another prime (20707807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10353900 + 10353901.

It is an arithmetic number, because the mean of its divisors is an integer number (10353901).

Almost surely, 2^20707801 is an apocalyptic number.

It is an amenable number.

20707801 is a deficient number, since it is larger than the sum of its proper divisors (1).

20707801 is an equidigital number, since it uses as much as digits as its factorization.

20707801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 20707801 is about 4550.5824901874. The cubic root of 20707801 is about 274.6068254640.

The spelling of 20707801 in words is "twenty million, seven hundred seven thousand, eight hundred one".