20727289720 has 32 divisors (see below), whose sum is σ = 46722654720. Its totient is φ = 8275582080.

The previous prime is 20727289651. The next prime is 20727289727. The reversal of 20727289720 is 2798272702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20727289727) 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 7 ways as a sum of consecutive naturals, for example, 457272 + ... + 500551.

It is an arithmetic number, because the mean of its divisors is an integer number (1460082960).

Almost surely, 2^20727289720 is an apocalyptic number.

20727289720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20727289720 is an abundant number, since it is smaller than the sum of its proper divisors (25995365000).

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

20727289720 is a wasteful number, since it uses less digits than its factorization.

20727289720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958375 (or 958371 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 46.

The spelling of 20727289720 in words is "twenty billion, seven hundred twenty-seven million, two hundred eighty-nine thousand, seven hundred twenty".