20727723863 has 24 divisors (see below), whose sum is σ = 26115756576. Its totient is φ = 16103324160.

The previous prime is 20727723839. The next prime is 20727723917. The reversal of 20727723863 is 36832772702.

It is not a de Polignac number, because 20727723863 - 2⁸ = 20727723607 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20727723803) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 249131 + ... + 321747.

It is an arithmetic number, because the mean of its divisors is an integer number (1088156524).

Almost surely, 2^20727723863 is an apocalyptic number.

20727723863 is a deficient number, since it is larger than the sum of its proper divisors (5388032713).

20727723863 is a wasteful number, since it uses less digits than its factorization.

20727723863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72983 (or 72972 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 47.

The spelling of 20727723863 in words is "twenty billion, seven hundred twenty-seven million, seven hundred twenty-three thousand, eight hundred sixty-three".