21298882 has 32 divisors (see below), whose sum is σ = 36158400. Its totient is φ = 9326400.

The previous prime is 21298877. The next prime is 21298883. The reversal of 21298882 is 28889212.

It is not an unprimeable number, because it can be changed into a prime (21298883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79044 + ... + 79312.

It is an arithmetic number, because the mean of its divisors is an integer number (1129950).

Almost surely, 2^21298882 is an apocalyptic number.

21298882 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21298882 is a deficient number, since it is larger than the sum of its proper divisors (14859518).

21298882 is a wasteful number, since it uses less digits than its factorization.

21298882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402.

The product of its digits is 36864, while the sum is 40.

The square root of 21298882 is about 4615.0711803828. The cubic root of 21298882 is about 277.1951341748.

It can be divided in two parts, 2129 and 8882, that added together give a palindrome (11011).

The spelling of 21298882 in words is "twenty-one million, two hundred ninety-eight thousand, eight hundred eighty-two".