20188646306220 has 96 divisors (see below), whose sum is σ = 64646425783296. Its totient is φ = 4611493612800.

The previous prime is 20188646306159. The next prime is 20188646306237. The reversal of 20188646306220 is 2260364688102.

It is a self number, because there is not a number n which added to its sum of digits gives 20188646306220.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15271471 + ... + 16540710.

It is an arithmetic number, because the mean of its divisors is an integer number (673400268576).

Almost surely, 2^{20188646306220} is an apocalyptic number.

20188646306220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20188646306220 is an abundant number, since it is smaller than the sum of its proper divisors (44457779477076).

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

20188646306220 is a wasteful number, since it uses less digits than its factorization.

20188646306220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31813711 (or 31813709 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 48.

The spelling of 20188646306220 in words is "twenty trillion, one hundred eighty-eight billion, six hundred forty-six million, three hundred six thousand, two hundred twenty".