22432421 has 8 divisors (see below), whose sum is σ = 24689664. Its totient is φ = 20211520.

The previous prime is 22432411. The next prime is 22432433. The reversal of 22432421 is 12423422.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22432421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22432393 and 22432402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22432411) 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, 7781 + ... + 10266.

It is an arithmetic number, because the mean of its divisors is an integer number (3086208).

Almost surely, 2^22432421 is an apocalyptic number.

It is an amenable number.

22432421 is a deficient number, since it is larger than the sum of its proper divisors (2257243).

22432421 is a wasteful number, since it uses less digits than its factorization.

22432421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18171.

The product of its digits is 768, while the sum is 20.

The square root of 22432421 is about 4736.2876812964. The cubic root of 22432421 is about 282.0278840023.

Adding to 22432421 its reverse (12423422), we get a palindrome (34855843).

It can be divided in two parts, 2243 and 2421, that added together give a palindrome (4664).

The spelling of 22432421 in words is "twenty-two million, four hundred thirty-two thousand, four hundred twenty-one".