20725311727 has 4 divisors (see below), whose sum is σ = 20729635200. Its totient is φ = 20720988256.

The previous prime is 20725311697. The next prime is 20725311731. The reversal of 20725311727 is 72711352702.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20725311727 - 2¹⁹ = 20724787439 is a prime.

It is a super-3 number, since 3×20725311727³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20725311787) 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 3 ways as a sum of consecutive naturals, for example, 2154538 + ... + 2164135.

It is an arithmetic number, because the mean of its divisors is an integer number (5182408800).

Almost surely, 2^20725311727 is an apocalyptic number.

20725311727 is a deficient number, since it is larger than the sum of its proper divisors (4323473).

20725311727 is an equidigital number, since it uses as much as digits as its factorization.

20725311727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4323472.

The product of its (nonzero) digits is 41160, while the sum is 37.

The spelling of 20725311727 in words is "twenty billion, seven hundred twenty-five million, three hundred eleven thousand, seven hundred twenty-seven".