21143400023 has 8 divisors (see below), whose sum is σ = 21420429360. Its totient is φ = 20867880960.

The previous prime is 21143400007. The next prime is 21143400029. The reversal of 21143400023 is 32000434112.

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 21143400023 - 2⁴ = 21143400007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21143399968 and 21143400004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21143400029) 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, 349373 + ... + 405398.

It is an arithmetic number, because the mean of its divisors is an integer number (2677553670).

Almost surely, 2^21143400023 is an apocalyptic number.

21143400023 is a deficient number, since it is larger than the sum of its proper divisors (277029337).

21143400023 is a wasteful number, since it uses less digits than its factorization.

21143400023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755137.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21143400023 its reverse (32000434112), we get a palindrome (53143834135).

The spelling of 21143400023 in words is "twenty-one billion, one hundred forty-three million, four hundred thousand, twenty-three".