20699713 has 2 divisors, whose sum is σ = 20699714. Its totient is φ = 20699712.

The previous prime is 20699671. The next prime is 20699753. The reversal of 20699713 is 31799602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15186609 + 5513104 = 3897^2 + 2348^2 .

It is a cyclic number.

It is not a de Polignac number, because 20699713 - 2¹⁷ = 20568641 is a prime.

It is not a weakly prime, because it can be changed into another prime (20699753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10349856 + 10349857.

It is an arithmetic number, because the mean of its divisors is an integer number (10349857).

Almost surely, 2^20699713 is an apocalyptic number.

It is an amenable number.

20699713 is a deficient number, since it is larger than the sum of its proper divisors (1).

20699713 is an equidigital number, since it uses as much as digits as its factorization.

20699713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 20699713 is about 4549.6937259556. The cubic root of 20699713 is about 274.5710690643.

It can be divided in two parts, 20699 and 713, that added together give a palindrome (21412).

The spelling of 20699713 in words is "twenty million, six hundred ninety-nine thousand, seven hundred thirteen".