20696772013 has 2 divisors, whose sum is σ = 20696772014. Its totient is φ = 20696772012.

The previous prime is 20696772007. The next prime is 20696772023. The reversal of 20696772013 is 31027769602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20690808649 + 5963364 = 143843^2 + 2442^2 .

It is a cyclic number.

It is not a de Polignac number, because 20696772013 - 2⁵ = 20696771981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20696772023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10348386006 + 10348386007.

It is an arithmetic number, because the mean of its divisors is an integer number (10348386007).

Almost surely, 2^20696772013 is an apocalyptic number.

It is an amenable number.

20696772013 is a deficient number, since it is larger than the sum of its proper divisors (1).

20696772013 is an equidigital number, since it uses as much as digits as its factorization.

20696772013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 43.

The spelling of 20696772013 in words is "twenty billion, six hundred ninety-six million, seven hundred seventy-two thousand, thirteen".