20302240143 has 4 divisors (see below), whose sum is σ = 27069653528. Its totient is φ = 13534826760.

The previous prime is 20302240121. The next prime is 20302240181. The reversal of 20302240143 is 34104220302.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20302240143 - 2⁹ = 20302239631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20302240243) 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 3 ways as a sum of consecutive naturals, for example, 3383706688 + ... + 3383706693.

It is an arithmetic number, because the mean of its divisors is an integer number (6767413382).

Almost surely, 2^20302240143 is an apocalyptic number.

20302240143 is a deficient number, since it is larger than the sum of its proper divisors (6767413385).

20302240143 is an equidigital number, since it uses as much as digits as its factorization.

20302240143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6767413384.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20302240143 its reverse (34104220302), we get a palindrome (54406460445).

The spelling of 20302240143 in words is "twenty billion, three hundred two million, two hundred forty thousand, one hundred forty-three".