21325026 has 8 divisors (see below), whose sum is σ = 42650064. Its totient is φ = 7108340.

The previous prime is 21325013. The next prime is 21325037. The reversal of 21325026 is 62052312.

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

21325026 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21324993 and 21325011.

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 3 ways as a sum of consecutive naturals, for example, 1777080 + ... + 1777091.

It is an arithmetic number, because the mean of its divisors is an integer number (5331258).

Almost surely, 2^21325026 is an apocalyptic number.

21325026 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21325026 is a wasteful number, since it uses less digits than its factorization.

21325026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3554176.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 21325026 is about 4617.9027707391. The cubic root of 21325026 is about 277.3085051712.

Adding to 21325026 its reverse (62052312), we get a palindrome (83377338).

The spelling of 21325026 in words is "twenty-one million, three hundred twenty-five thousand, twenty-six".