20345861195999 has 8 divisors (see below), whose sum is σ = 20365622499600. Its totient is φ = 20326100591296.

The previous prime is 20345861195987. The next prime is 20345861196049. The reversal of 20345861195999 is 99959116854302.

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 20345861195999 - 2⁸ = 20345861195743 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 (20345861195299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72825872 + ... + 73104714.

It is an arithmetic number, because the mean of its divisors is an integer number (2545702812450).

Almost surely, 2^{20345861195999} is an apocalyptic number.

20345861195999 is a deficient number, since it is larger than the sum of its proper divisors (19761303601).

20345861195999 is a wasteful number, since it uses less digits than its factorization.

20345861195999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349449.

The product of its (nonzero) digits is 188956800, while the sum is 71.

The spelling of 20345861195999 in words is "twenty trillion, three hundred forty-five billion, eight hundred sixty-one million, one hundred ninety-five thousand, nine hundred ninety-nine".