21404223143 has 8 divisors (see below), whose sum is σ = 21928497360. Its totient is φ = 20880054720.

The previous prime is 21404223119. The next prime is 21404223149. The reversal of 21404223143 is 34132240412.

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 21404223143 - 2¹⁸ = 21403960999 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 (21404223149) 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, 519173 + ... + 558881.

It is an arithmetic number, because the mean of its divisors is an integer number (2741062170).

Almost surely, 2^21404223143 is an apocalyptic number.

21404223143 is a deficient number, since it is larger than the sum of its proper divisors (524274217).

21404223143 is a wasteful number, since it uses less digits than its factorization.

21404223143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52897.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21404223143 its reverse (34132240412), we get a palindrome (55536463555).

The spelling of 21404223143 in words is "twenty-one billion, four hundred four million, two hundred twenty-three thousand, one hundred forty-three".