20701210669 has 2 divisors, whose sum is σ = 20701210670. Its totient is φ = 20701210668.

The previous prime is 20701210667. The next prime is 20701210723. The reversal of 20701210669 is 96601210702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20667512644 + 33698025 = 143762^2 + 5805^2 .

It is a cyclic number.

It is not a de Polignac number, because 20701210669 - 2¹ = 20701210667 is a prime.

It is a super-2 number, since 2×20701210669² (a number of 21 digits) contains 22 as substring.

Together with 20701210667, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20701210667) 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, 10350605334 + 10350605335.

It is an arithmetic number, because the mean of its divisors is an integer number (10350605335).

Almost surely, 2^20701210669 is an apocalyptic number.

It is an amenable number.

20701210669 is a deficient number, since it is larger than the sum of its proper divisors (1).

20701210669 is an equidigital number, since it uses as much as digits as its factorization.

20701210669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The spelling of 20701210669 in words is "twenty billion, seven hundred one million, two hundred ten thousand, six hundred sixty-nine".