21925443 has 8 divisors (see below), whose sum is σ = 29444800. Its totient is φ = 14511528.

The previous prime is 21925433. The next prime is 21925471. The reversal of 21925443 is 34452912.

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

It is not a de Polignac number, because 21925443 - 2¹⁶ = 21859907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21925443.

It is not an unprimeable number, because it can be changed into a prime (21925433) 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, 25873 + ... + 26706.

It is an arithmetic number, because the mean of its divisors is an integer number (3680600).

Almost surely, 2^21925443 is an apocalyptic number.

21925443 is a deficient number, since it is larger than the sum of its proper divisors (7519357).

21925443 is a wasteful number, since it uses less digits than its factorization.

21925443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52721.

The product of its digits is 8640, while the sum is 30.

The square root of 21925443 is about 4682.4612117988. The cubic root of 21925443 is about 279.8870420215.

The spelling of 21925443 in words is "twenty-one million, nine hundred twenty-five thousand, four hundred forty-three".