21868431743373 has 4 divisors (see below), whose sum is σ = 29157908991168. Its totient is φ = 14578954495580.

The previous prime is 21868431743363. The next prime is 21868431743377. The reversal of 21868431743373 is 37334713486812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21868431743373 - 2¹⁰ = 21868431742349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21868431743377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3644738623893 + ... + 3644738623898.

It is an arithmetic number, because the mean of its divisors is an integer number (7289477247792).

Almost surely, 2^{21868431743373} is an apocalyptic number.

It is an amenable number.

21868431743373 is a deficient number, since it is larger than the sum of its proper divisors (7289477247795).

21868431743373 is an equidigital number, since it uses as much as digits as its factorization.

21868431743373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7289477247794.

The product of its digits is 48771072, while the sum is 60.

The spelling of 21868431743373 in words is "twenty-one trillion, eight hundred sixty-eight billion, four hundred thirty-one million, seven hundred forty-three thousand, three hundred seventy-three".