12423632421 has 8 divisors (see below), whose sum is σ = 16566769024. Its totient is φ = 8281458720.

The previous prime is 12423632407. The next prime is 12423632471.

12423632421 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12423632421 - 2¹⁸ = 12423370277 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 (12423632401) 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, 210061 + ... + 262626.

It is an arithmetic number, because the mean of its divisors is an integer number (2070846128).

Almost surely, 2^12423632421 is an apocalyptic number.

It is an amenable number.

12423632421 is a deficient number, since it is larger than the sum of its proper divisors (4143136603).

12423632421 is an equidigital number, since it uses as much as digits as its factorization.

12423632421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481451.

The product of its digits is 13824, while the sum is 30.

The spelling of 12423632421 in words is "twelve billion, four hundred twenty-three million, six hundred thirty-two thousand, four hundred twenty-one".