20727818684 has 36 divisors (see below), whose sum is σ = 40208340144. Its totient is φ = 9330157056.

The previous prime is 20727818681. The next prime is 20727818723. The reversal of 20727818684 is 48681872702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20727818681) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 363209 + ... + 416384.

Almost surely, 2^20727818684 is an apocalyptic number.

It is an amenable number.

20727818684 is a deficient number, since it is larger than the sum of its proper divisors (19480521460).

20727818684 is a wasteful number, since it uses less digits than its factorization.

20727818684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779654 (or 779635 counting only the distinct ones).

The product of its (nonzero) digits is 2408448, while the sum is 53.

The spelling of 20727818684 in words is "twenty billion, seven hundred twenty-seven million, eight hundred eighteen thousand, six hundred eighty-four".