21812748143 has 2 divisors, whose sum is σ = 21812748144. Its totient is φ = 21812748142.

The previous prime is 21812748131. The next prime is 21812748149. The reversal of 21812748143 is 34184721812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21812748143 - 2³⁰ = 20739006319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21812748143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21812748149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10906374071 + 10906374072.

It is an arithmetic number, because the mean of its divisors is an integer number (10906374072).

Almost surely, 2^21812748143 is an apocalyptic number.

21812748143 is a deficient number, since it is larger than the sum of its proper divisors (1).

21812748143 is an equidigital number, since it uses as much as digits as its factorization.

21812748143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86016, while the sum is 41.

The spelling of 21812748143 in words is "twenty-one billion, eight hundred twelve million, seven hundred forty-eight thousand, one hundred forty-three".