21146884 has 24 divisors (see below), whose sum is σ = 41313888. Its totient is φ = 9387840.

The previous prime is 21146863. The next prime is 21146891. The reversal of 21146884 is 48864112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3697 + ... + 7480.

It is an arithmetic number, because the mean of its divisors is an integer number (1721412).

Almost surely, 2^21146884 is an apocalyptic number.

It is an amenable number.

21146884 is a deficient number, since it is larger than the sum of its proper divisors (20167004).

21146884 is a wasteful number, since it uses less digits than its factorization.

21146884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11235 (or 11233 counting only the distinct ones).

The product of its digits is 12288, while the sum is 34.

The square root of 21146884 is about 4598.5741268354. The cubic root of 21146884 is about 276.5341647095.

It can be divided in two parts, 2114 and 6884, that added together give a palindrome (8998).

The spelling of 21146884 in words is "twenty-one million, one hundred forty-six thousand, eight hundred eighty-four".