20312653339969 has 2 divisors, whose sum is σ = 20312653339970. Its totient is φ = 20312653339968.

The previous prime is 20312653339963. The next prime is 20312653340003. The reversal of 20312653339969 is 96993335621302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20103610527025 + 209042812944 = 4483705^2 + 457212^2 .

It is a cyclic number.

It is not a de Polignac number, because 20312653339969 - 2²⁷ = 20312519122241 is a prime.

It is a super-2 number, since 2×20312653339969² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20312653339963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156326669984 + 10156326669985.

It is an arithmetic number, because the mean of its divisors is an integer number (10156326669985).

Almost surely, 2^{20312653339969} is an apocalyptic number.

It is an amenable number.

20312653339969 is a deficient number, since it is larger than the sum of its proper divisors (1).

20312653339969 is an equidigital number, since it uses as much as digits as its factorization.

20312653339969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42515280, while the sum is 61.

The spelling of 20312653339969 in words is "twenty trillion, three hundred twelve billion, six hundred fifty-three million, three hundred thirty-nine thousand, nine hundred sixty-nine".