20345025664633 has 4 divisors (see below), whose sum is σ = 20345240861568. Its totient is φ = 20344810467700.

The previous prime is 20345025664577. The next prime is 20345025664661. The reversal of 20345025664633 is 33646652054302.

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 20345025664633 - 2²⁹ = 20344488793721 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20345025664933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107456593 + ... + 107645758.

It is an arithmetic number, because the mean of its divisors is an integer number (5086310215392).

Almost surely, 2^{20345025664633} is an apocalyptic number.

It is an amenable number.

20345025664633 is a deficient number, since it is larger than the sum of its proper divisors (215196935).

20345025664633 is an equidigital number, since it uses as much as digits as its factorization.

20345025664633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215196934.

The product of its (nonzero) digits is 9331200, while the sum is 49.

The spelling of 20345025664633 in words is "twenty trillion, three hundred forty-five billion, twenty-five million, six hundred sixty-four thousand, six hundred thirty-three".