20568354183407 has 4 divisors (see below), whose sum is σ = 20591031531816. Its totient is φ = 20545676835000.

The previous prime is 20568354183383. The next prime is 20568354183413. The reversal of 20568354183407 is 70438145386502.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20568354183407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20568354183107) 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, 11338672844 + ... + 11338674657.

It is an arithmetic number, because the mean of its divisors is an integer number (5147757882954).

Almost surely, 2^{20568354183407} is an apocalyptic number.

20568354183407 is a deficient number, since it is larger than the sum of its proper divisors (22677348409).

20568354183407 is an equidigital number, since it uses as much as digits as its factorization.

20568354183407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22677348408.

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

The spelling of 20568354183407 in words is "twenty trillion, five hundred sixty-eight billion, three hundred fifty-four million, one hundred eighty-three thousand, four hundred seven".