21826325 has 12 divisors (see below), whose sum is σ = 27938688. Its totient is φ = 16897200.

The previous prime is 21826267. The next prime is 21826361. The reversal of 21826325 is 52362812.

It is not a de Polignac number, because 21826325 - 2¹⁸ = 21564181 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13307 + ... + 14856.

It is an arithmetic number, because the mean of its divisors is an integer number (2328224).

Almost surely, 2^21826325 is an apocalyptic number.

21826325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21826325 is a deficient number, since it is larger than the sum of its proper divisors (6112363).

21826325 is a wasteful number, since it uses less digits than its factorization.

21826325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28204 (or 28199 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 21826325 is about 4671.8652591872. The cubic root of 21826325 is about 279.4646445786.

The spelling of 21826325 in words is "twenty-one million, eight hundred twenty-six thousand, three hundred twenty-five".