20800866025830 has 64 divisors (see below), whose sum is σ = 56338395782400. Its totient is φ = 4868750248320.

The previous prime is 20800866025811. The next prime is 20800866025831. The reversal of 20800866025830 is 3852066800802.

It is a self number, because there is not a number n which added to its sum of digits gives 20800866025830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20800866025831) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1086765040 + ... + 1086784179.

It is an arithmetic number, because the mean of its divisors is an integer number (880287434100).

Almost surely, 2^{20800866025830} is an apocalyptic number.

20800866025830 is an abundant number, since it is smaller than the sum of its proper divisors (35537529756570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20800866025830 is a wasteful number, since it uses less digits than its factorization.

20800866025830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2173549269.

The product of its (nonzero) digits is 1105920, while the sum is 48.

The spelling of 20800866025830 in words is "twenty trillion, eight hundred billion, eight hundred sixty-six million, twenty-five thousand, eight hundred thirty".