21402114423 has 16 divisors (see below), whose sum is σ = 28839439200. Its totient is φ = 14116636800.

The previous prime is 21402114367. The next prime is 21402114449. The reversal of 21402114423 is 32441120412.

It is not a de Polignac number, because 21402114423 - 2⁹ = 21402113911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21402114393 and 21402114402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21402114323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 408273 + ... + 457701.

It is an arithmetic number, because the mean of its divisors is an integer number (1802464950).

Almost surely, 2^21402114423 is an apocalyptic number.

21402114423 is a deficient number, since it is larger than the sum of its proper divisors (7437324777).

21402114423 is a wasteful number, since it uses less digits than its factorization.

21402114423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50962.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21402114423 its reverse (32441120412), we get a palindrome (53843234835).

The spelling of 21402114423 in words is "twenty-one billion, four hundred two million, one hundred fourteen thousand, four hundred twenty-three".