21825035 has 4 divisors (see below), whose sum is σ = 26190048. Its totient is φ = 17460024.

The previous prime is 21825031. The next prime is 21825043. The reversal of 21825035 is 53052812.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21825035 - 2² = 21825031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21824995 and 21825013.

It is not an unprimeable number, because it can be changed into a prime (21825031) 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, 2182499 + ... + 2182508.

It is an arithmetic number, because the mean of its divisors is an integer number (6547512).

Almost surely, 2^21825035 is an apocalyptic number.

21825035 is a deficient number, since it is larger than the sum of its proper divisors (4365013).

21825035 is an equidigital number, since it uses as much as digits as its factorization.

21825035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4365012.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 21825035 is about 4671.7271966586. The cubic root of 21825035 is about 279.4591387426.

Adding to 21825035 its reverse (53052812), we get a palindrome (74877847).

The spelling of 21825035 in words is "twenty-one million, eight hundred twenty-five thousand, thirty-five".