20727934720 has 144 divisors (see below), whose sum is σ = 50637565440. Its totient is φ = 8127516672.

The previous prime is 20727934681. The next prime is 20727934739. The reversal of 20727934720 is 2743972702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22554421 + ... + 22555339.

It is an arithmetic number, because the mean of its divisors is an integer number (351649760).

Almost surely, 2^20727934720 is an apocalyptic number.

20727934720 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 20727934720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25318782720).

20727934720 is an abundant number, since it is smaller than the sum of its proper divisors (29909630720).

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

20727934720 is an equidigital number, since it uses as much as digits as its factorization.

20727934720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1270 (or 1256 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 43.

The spelling of 20727934720 in words is "twenty billion, seven hundred twenty-seven million, nine hundred thirty-four thousand, seven hundred twenty".