21358722143 has 8 divisors (see below), whose sum is σ = 23307630336. Its totient is φ = 19411015000.

The previous prime is 21358722131. The next prime is 21358722179. The reversal of 21358722143 is 34122785312.

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 21358722143 - 2⁴ = 21358722127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21358722097 and 21358722106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21358722193) 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 7 ways as a sum of consecutive naturals, for example, 262871 + ... + 334392.

It is an arithmetic number, because the mean of its divisors is an integer number (2913453792).

Almost surely, 2^21358722143 is an apocalyptic number.

21358722143 is a deficient number, since it is larger than the sum of its proper divisors (1948908193).

21358722143 is a wasteful number, since it uses less digits than its factorization.

21358722143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600525.

The product of its digits is 80640, while the sum is 38.

It can be divided in two parts, 2135 and 8722143, that added together give a palindrome (8724278).

The spelling of 21358722143 in words is "twenty-one billion, three hundred fifty-eight million, seven hundred twenty-two thousand, one hundred forty-three".