22030421 has 4 divisors (see below), whose sum is σ = 25177632. Its totient is φ = 18883212.

The previous prime is 22030409. The next prime is 22030427. The reversal of 22030421 is 12403022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22030421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22030396 and 22030405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22030427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1573595 + ... + 1573608.

It is an arithmetic number, because the mean of its divisors is an integer number (6294408).

Almost surely, 2^22030421 is an apocalyptic number.

It is an amenable number.

22030421 is a deficient number, since it is larger than the sum of its proper divisors (3147211).

22030421 is an equidigital number, since it uses as much as digits as its factorization.

22030421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3147210.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 22030421 is about 4693.6575290492. The cubic root of 22030421 is about 280.3330263672. Note that the first 3 decimals are identical.

Adding to 22030421 its reverse (12403022), we get a palindrome (34433443).

The spelling of 22030421 in words is "twenty-two million, thirty thousand, four hundred twenty-one".