21825435 has 8 divisors (see below), whose sum is σ = 34920720. Its totient is φ = 11640224.

The previous prime is 21825403. The next prime is 21825439. The reversal of 21825435 is 53452812.

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

It is a cyclic number.

It is not a de Polignac number, because 21825435 - 2⁵ = 21825403 is a prime.

It is a super-2 number, since 2×21825435² = 952699225878450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21825439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 727500 + ... + 727529.

It is an arithmetic number, because the mean of its divisors is an integer number (4365090).

Almost surely, 2^21825435 is an apocalyptic number.

21825435 is a deficient number, since it is larger than the sum of its proper divisors (13095285).

21825435 is a wasteful number, since it uses less digits than its factorization.

21825435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455037.

The product of its digits is 9600, while the sum is 30.

The square root of 21825435 is about 4671.7700071814. The cubic root of 21825435 is about 279.4608460018.

The spelling of 21825435 in words is "twenty-one million, eight hundred twenty-five thousand, four hundred thirty-five".