20195831228680 has 128 divisors (see below), whose sum is σ = 49323378988800. Its totient is φ = 7417046016000.

The previous prime is 20195831228603. The next prime is 20195831228689. The reversal of 20195831228680 is 8682213859102.

It is not an unprimeable number, because it can be changed into a prime (20195831228689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2559024 + ... + 6851296.

It is an arithmetic number, because the mean of its divisors is an integer number (385338898350).

Almost surely, 2^{20195831228680} is an apocalyptic number.

20195831228680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20195831228680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24661689494400).

20195831228680 is an abundant number, since it is smaller than the sum of its proper divisors (29127547760120).

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

20195831228680 is a wasteful number, since it uses less digits than its factorization.

20195831228680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4292495 (or 4292491 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 55.

The spelling of 20195831228680 in words is "twenty trillion, one hundred ninety-five billion, eight hundred thirty-one million, two hundred twenty-eight thousand, six hundred eighty".