21354034143 has 8 divisors (see below), whose sum is σ = 30662202928. Its totient is φ = 13140944064.

The previous prime is 21354034099. The next prime is 21354034151. The reversal of 21354034143 is 34143045312.

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

It is not a de Polignac number, because 21354034143 - 2¹⁴ = 21354017759 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21354034143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21354034193) 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, 273769630 + ... + 273769707.

It is an arithmetic number, because the mean of its divisors is an integer number (3832775366).

Almost surely, 2^21354034143 is an apocalyptic number.

21354034143 is a deficient number, since it is larger than the sum of its proper divisors (9308168785).

21354034143 is a wasteful number, since it uses less digits than its factorization.

21354034143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547539353.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 21354034143 its reverse (34143045312), we get a palindrome (55497079455).

The spelling of 21354034143 in words is "twenty-one billion, three hundred fifty-four million, thirty-four thousand, one hundred forty-three".