21430004023 has 8 divisors (see below), whose sum is σ = 21509394192. Its totient is φ = 21350742336.

The previous prime is 21430004009. The next prime is 21430004083. The reversal of 21430004023 is 32040003412.

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 21430004023 - 2²⁹ = 20893133111 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 (21430004083) 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, 308736 + ... + 371722.

It is an arithmetic number, because the mean of its divisors is an integer number (2688674274).

Almost surely, 2^21430004023 is an apocalyptic number.

21430004023 is a deficient number, since it is larger than the sum of its proper divisors (79390169).

21430004023 is an equidigital number, since it uses as much as digits as its factorization.

21430004023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64241.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21430004023 its reverse (32040003412), we get a palindrome (53470007435).

The spelling of 21430004023 in words is "twenty-one billion, four hundred thirty million, four thousand, twenty-three".