21373650344143 has 8 divisors (see below), whose sum is σ = 21712220685360. Its totient is φ = 21035655315840.

The previous prime is 21373650344119. The next prime is 21373650344147. The reversal of 21373650344143 is 34144305637312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21373650344143 - 2³⁷ = 21236211390671 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21373650344093 and 21373650344102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21373650344147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143753338 + ... + 143901943.

It is an arithmetic number, because the mean of its divisors is an integer number (2714027585670).

Almost surely, 2^{21373650344143} is an apocalyptic number.

21373650344143 is a deficient number, since it is larger than the sum of its proper divisors (338570341217).

21373650344143 is a wasteful number, since it uses less digits than its factorization.

21373650344143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287656457.

The product of its (nonzero) digits is 2177280, while the sum is 46.

The spelling of 21373650344143 in words is "twenty-one trillion, three hundred seventy-three billion, six hundred fifty million, three hundred forty-four thousand, one hundred forty-three".