20813971882 has 16 divisors (see below), whose sum is σ = 34124618304. Its totient is φ = 9442732000.

The previous prime is 20813971847. The next prime is 20813971889. The reversal of 20813971882 is 28817931802.

It is not an unprimeable number, because it can be changed into a prime (20813971889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 896494 + ... + 919417.

It is an arithmetic number, because the mean of its divisors is an integer number (2132788644).

Almost surely, 2^20813971882 is an apocalyptic number.

20813971882 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20813971882 is a deficient number, since it is larger than the sum of its proper divisors (13310646422).

20813971882 is a wasteful number, since it uses less digits than its factorization.

20813971882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816445.

The product of its (nonzero) digits is 387072, while the sum is 49.

The spelling of 20813971882 in words is "twenty billion, eight hundred thirteen million, nine hundred seventy-one thousand, eight hundred eighty-two".