21326036 has 12 divisors (see below), whose sum is σ = 37427040. Its totient is φ = 10632600.

The previous prime is 21326021. The next prime is 21326069. The reversal of 21326036 is 63062312.

It is a super-2 number, since 2×21326036² = 909599622946592, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 5990 + ... + 8861.

It is an arithmetic number, because the mean of its divisors is an integer number (3118920).

Almost surely, 2^21326036 is an apocalyptic number.

It is an amenable number.

21326036 is a deficient number, since it is larger than the sum of its proper divisors (16101004).

21326036 is a wasteful number, since it uses less digits than its factorization.

21326036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15214 (or 15212 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 21326036 is about 4618.0121264458. The cubic root of 21326036 is about 277.3128830818.

Adding to 21326036 its reverse (63062312), we get a palindrome (84388348).

The spelling of 21326036 in words is "twenty-one million, three hundred twenty-six thousand, thirty-six".