20750388644513 has 8 divisors (see below), whose sum is σ = 23620995769536. Its totient is φ = 18043816212400.

The previous prime is 20750388644473. The next prime is 20750388644543. The reversal of 20750388644513 is 31544688305702.

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

It is not a de Polignac number, because 20750388644513 - 2²⁰ = 20750387595937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20750388644543) 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, 41008672958 + ... + 41008673463.

It is an arithmetic number, because the mean of its divisors is an integer number (2952624471192).

Almost surely, 2^{20750388644513} is an apocalyptic number.

20750388644513 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20750388644513 is a deficient number, since it is larger than the sum of its proper divisors (2870607125023).

20750388644513 is a wasteful number, since it uses less digits than its factorization.

20750388644513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82017346455.

The product of its (nonzero) digits is 19353600, while the sum is 56.

The spelling of 20750388644513 in words is "twenty trillion, seven hundred fifty billion, three hundred eighty-eight million, six hundred forty-four thousand, five hundred thirteen".