20643938195007 has 8 divisors (see below), whose sum is σ = 27530309807280. Its totient is φ = 13760096023040.

The previous prime is 20643938194987. The next prime is 20643938195009. The reversal of 20643938195007 is 70059183934602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20643938195007 - 2³⁸ = 20369060288063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20643938195009) 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 7 ways as a sum of consecutive naturals, for example, 632341032 + ... + 632373677.

It is an arithmetic number, because the mean of its divisors is an integer number (3441288725910).

It is a 1-persistent number, because it is pandigital, but 2⋅20643938195007 = 41287876390014 is not.

Almost surely, 2^{20643938195007} is an apocalyptic number.

20643938195007 is a deficient number, since it is larger than the sum of its proper divisors (6886371612273).

20643938195007 is a wasteful number, since it uses less digits than its factorization.

20643938195007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264720153.

The product of its (nonzero) digits is 9797760, while the sum is 57.

The spelling of 20643938195007 in words is "twenty trillion, six hundred forty-three billion, nine hundred thirty-eight million, one hundred ninety-five thousand, seven".