20682891164 has 24 divisors (see below), whose sum is σ = 39017572608. Its totient is φ = 9536575680.

The previous prime is 20682891149. The next prime is 20682891179. The reversal of 20682891164 is 46119828602.

It is an interprime number because it is at equal distance from previous prime (20682891149) and next prime (20682891179).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141692 + ... + 247875.

It is an arithmetic number, because the mean of its divisors is an integer number (1625732192).

Almost surely, 2^20682891164 is an apocalyptic number.

It is an amenable number.

20682891164 is a deficient number, since it is larger than the sum of its proper divisors (18334681444).

20682891164 is a wasteful number, since it uses less digits than its factorization.

20682891164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390605 (or 390603 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 47.

The spelling of 20682891164 in words is "twenty billion, six hundred eighty-two million, eight hundred ninety-one thousand, one hundred sixty-four".