21432144402023 has 8 divisors (see below), whose sum is σ = 21752160372480. Its totient is φ = 21112132349880.

The previous prime is 21432144401981. The next prime is 21432144402041. The reversal of 21432144402023 is 32020444123412.

It is a happy number.

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 21432144402023 - 2¹² = 21432144397927 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 (21432144402043) 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, 11155538 + ... + 12934848.

It is an arithmetic number, because the mean of its divisors is an integer number (2719020046560).

Almost surely, 2^{21432144402023} is an apocalyptic number.

21432144402023 is a deficient number, since it is larger than the sum of its proper divisors (320015970457).

21432144402023 is a wasteful number, since it uses less digits than its factorization.

21432144402023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1959157.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 21432144402023 its reverse (32020444123412), we get a palindrome (53452588525435).

The spelling of 21432144402023 in words is "twenty-one trillion, four hundred thirty-two billion, one hundred forty-four million, four hundred two thousand, twenty-three".