21430041423 has 32 divisors (see below), whose sum is σ = 34383575040. Its totient is φ = 11597994720.

The previous prime is 21430041343. The next prime is 21430041449. The reversal of 21430041423 is 32414003412.

It is not a de Polignac number, because 21430041423 - 2⁸ = 21430041167 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21430041393 and 21430041402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21430041473) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2384328 + ... + 2393298.

It is an arithmetic number, because the mean of its divisors is an integer number (1074486720).

Almost surely, 2^21430041423 is an apocalyptic number.

21430041423 is a deficient number, since it is larger than the sum of its proper divisors (12953533617).

21430041423 is a wasteful number, since it uses less digits than its factorization.

21430041423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14987.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21430041423 its reverse (32414003412), we get a palindrome (53844044835).

The spelling of 21430041423 in words is "twenty-one billion, four hundred thirty million, forty-one thousand, four hundred twenty-three".