20702202569 has 2 divisors, whose sum is σ = 20702202570. Its totient is φ = 20702202568.

The previous prime is 20702202539. The next prime is 20702202581. The reversal of 20702202569 is 96520220702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19491510544 + 1210692025 = 139612^2 + 34795^2 .

It is a cyclic number.

It is not a de Polignac number, because 20702202569 - 2²⁴ = 20685425353 is a prime.

It is a super-2 number, since 2×20702202569² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20702202539) 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, 10351101284 + 10351101285.

It is an arithmetic number, because the mean of its divisors is an integer number (10351101285).

Almost surely, 2^20702202569 is an apocalyptic number.

It is an amenable number.

20702202569 is a deficient number, since it is larger than the sum of its proper divisors (1).

20702202569 is an equidigital number, since it uses as much as digits as its factorization.

20702202569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 20702202569 in words is "twenty billion, seven hundred two million, two hundred two thousand, five hundred sixty-nine".