20307070326721 has 4 divisors (see below), whose sum is σ = 20308299659200. Its totient is φ = 20305840994244.

The previous prime is 20307070326623. The next prime is 20307070326743. The reversal of 20307070326721 is 12762307070302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20307070326721 - 2⁹ = 20307070326209 is a prime.

It is a super-2 number, since 2×20307070326721² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20307070320721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 614641461 + ... + 614674498.

It is an arithmetic number, because the mean of its divisors is an integer number (5077074914800).

Almost surely, 2^{20307070326721} is an apocalyptic number.

It is an amenable number.

20307070326721 is a deficient number, since it is larger than the sum of its proper divisors (1229332479).

20307070326721 is a wasteful number, since it uses less digits than its factorization.

20307070326721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229332478.

The product of its (nonzero) digits is 148176, while the sum is 40.

The spelling of 20307070326721 in words is "twenty trillion, three hundred seven billion, seventy million, three hundred twenty-six thousand, seven hundred twenty-one".