22430421 has 24 divisors (see below), whose sum is σ = 35642880. Its totient is φ = 13506336.

The previous prime is 22430411. The next prime is 22430423. The reversal of 22430421 is 12403422.

22430421 is a `hidden beast` number, since 2 + 243 + 0 + 421 = 666.

It is not a de Polignac number, because 22430421 - 2⁹ = 22429909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22430394 and 22430403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22430423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3460 + ... + 7538.

It is an arithmetic number, because the mean of its divisors is an integer number (1485120).

Almost surely, 2^22430421 is an apocalyptic number.

It is an amenable number.

22430421 is a deficient number, since it is larger than the sum of its proper divisors (13212459).

22430421 is a wasteful number, since it uses less digits than its factorization.

22430421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4145 (or 4142 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 22430421 is about 4736.0765407666. The cubic root of 22430421 is about 282.0195021974.

Adding to 22430421 its reverse (12403422), we get a palindrome (34833843).

The spelling of 22430421 in words is "twenty-two million, four hundred thirty thousand, four hundred twenty-one".