20642230540143 has 24 divisors (see below), whose sum is σ = 29901227801120. Its totient is φ = 13722461553600.

The previous prime is 20642230540097. The next prime is 20642230540147. The reversal of 20642230540143 is 34104503224602.

20642230540143 is a `hidden beast` number, since 2 + 0 + 6 + 42 + 2 + 30 + 540 + 1 + 43 = 666.

It is not a de Polignac number, because 20642230540143 - 2⁹ = 20642230539631 is a prime.

It is a super-2 number, since 2×20642230540143² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20642230540098 and 20642230540107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20642230540147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2316918 + ... + 6830268.

Almost surely, 2^{20642230540143} is an apocalyptic number.

20642230540143 is a deficient number, since it is larger than the sum of its proper divisors (9258997260977).

20642230540143 is a wasteful number, since it uses less digits than its factorization.

20642230540143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4514799 (or 4514796 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

Adding to 20642230540143 its reverse (34104503224602), we get a palindrome (54746733764745).

The spelling of 20642230540143 in words is "twenty trillion, six hundred forty-two billion, two hundred thirty million, five hundred forty thousand, one hundred forty-three".