21119244 has 24 divisors (see below), whose sum is σ = 51421440. Its totient is φ = 6733584.

The previous prime is 21119239. The next prime is 21119249. The reversal of 21119244 is 44291112.

It is an interprime number because it is at equal distance from previous prime (21119239) and next prime (21119249).

It is not an unprimeable number, because it can be changed into a prime (21119249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37984 + ... + 38535.

It is an arithmetic number, because the mean of its divisors is an integer number (2142560).

Almost surely, 2^21119244 is an apocalyptic number.

It is an amenable number.

21119244 is an abundant number, since it is smaller than the sum of its proper divisors (30302196).

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

21119244 is a wasteful number, since it uses less digits than its factorization.

21119244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76549 (or 76547 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

The square root of 21119244 is about 4595.5678648019. The cubic root of 21119244 is about 276.4136310046.

The spelling of 21119244 in words is "twenty-one million, one hundred nineteen thousand, two hundred forty-four".