21417408143 has 8 divisors (see below), whose sum is σ = 21589506048. Its totient is φ = 21245364504.

The previous prime is 21417408127. The next prime is 21417408269. The reversal of 21417408143 is 34180471412.

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 21417408143 - 2⁴ = 21417408127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21417408113) 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, 1236380 + ... + 1253582.

It is an arithmetic number, because the mean of its divisors is an integer number (2698688256).

Almost surely, 2^21417408143 is an apocalyptic number.

21417408143 is a deficient number, since it is larger than the sum of its proper divisors (172097905).

21417408143 is a wasteful number, since it uses less digits than its factorization.

21417408143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27133.

The product of its (nonzero) digits is 21504, while the sum is 35.

Adding to 21417408143 its reverse (34180471412), we get a palindrome (55597879555).

The spelling of 21417408143 in words is "twenty-one billion, four hundred seventeen million, four hundred eight thousand, one hundred forty-three".