20514871682 has 6 divisors (see below), whose sum is σ = 30772611363. Its totient is φ = 10257334562.

The previous prime is 20514871679. The next prime is 20514871687. The reversal of 20514871682 is 28617841502.

It can be written as a sum of positive squares in only one way, i.e., 10257435841 + 10257435841 = 101279^2 + 101279^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=101279.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20514871687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 151919 + ... + 253197.

Almost surely, 2^20514871682 is an apocalyptic number.

20514871682 is a deficient number, since it is larger than the sum of its proper divisors (10257739681).

20514871682 is an frugal number, since it uses more digits than its factorization.

20514871682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202560 (or 101281 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 44.

The spelling of 20514871682 in words is "twenty billion, five hundred fourteen million, eight hundred seventy-one thousand, six hundred eighty-two".