20282140021 has 16 divisors (see below), whose sum is σ = 23868250560. Its totient is φ = 16991205120.

The previous prime is 20282140001. The next prime is 20282140027. The reversal of 20282140021 is 12004128202.

It is a cyclic number.

It is not a de Polignac number, because 20282140021 - 2¹¹ = 20282137973 is a prime.

It is a super-2 number, since 2×20282140021² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20282139974 and 20282140001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20282140027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34791 + ... + 204388.

It is an arithmetic number, because the mean of its divisors is an integer number (1491765660).

Almost surely, 2^20282140021 is an apocalyptic number.

It is an amenable number.

20282140021 is a deficient number, since it is larger than the sum of its proper divisors (3586110539).

20282140021 is a wasteful number, since it uses less digits than its factorization.

20282140021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239796.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 20282140021 its reverse (12004128202), we get a palindrome (32286268223).

The spelling of 20282140021 in words is "twenty billion, two hundred eighty-two million, one hundred forty thousand, twenty-one".