20007845134579 has 4 divisors (see below), whose sum is σ = 20017450439176. Its totient is φ = 19998239829984.

The previous prime is 20007845134493. The next prime is 20007845134643. The reversal of 20007845134579 is 97543154870002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20007845134579 - 2¹⁷ = 20007845003507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20007845134679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4802649174 + ... + 4802653339.

It is an arithmetic number, because the mean of its divisors is an integer number (5004362609794).

Almost surely, 2^{20007845134579} is an apocalyptic number.

20007845134579 is a deficient number, since it is larger than the sum of its proper divisors (9605304597).

20007845134579 is an equidigital number, since it uses as much as digits as its factorization.

20007845134579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9605304596.

The product of its (nonzero) digits is 8467200, while the sum is 55.

The spelling of 20007845134579 in words is "twenty trillion, seven billion, eight hundred forty-five million, one hundred thirty-four thousand, five hundred seventy-nine".