21803324 has 12 divisors (see below), whose sum is σ = 38199000. Its totient is φ = 10889328.

The previous prime is 21803321. The next prime is 21803371. The reversal of 21803324 is 42330812.

It is a self number, because there is not a number n which added to its sum of digits gives 21803324.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21803321) 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, 1727 + ... + 6825.

It is an arithmetic number, because the mean of its divisors is an integer number (3183250).

Almost surely, 2^21803324 is an apocalyptic number.

It is an amenable number.

21803324 is a deficient number, since it is larger than the sum of its proper divisors (16395676).

21803324 is a wasteful number, since it uses less digits than its factorization.

21803324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6172 (or 6170 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 21803324 is about 4669.4029596941. The cubic root of 21803324 is about 279.3664416732.

The spelling of 21803324 in words is "twenty-one million, eight hundred three thousand, three hundred twenty-four".