21245334 has 32 divisors (see below), whose sum is σ = 46531584. Its totient is φ = 6413280.

The previous prime is 21245317. The next prime is 21245347. The reversal of 21245334 is 43354212.

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 15 ways as a sum of consecutive naturals, for example, 24187 + ... + 25049.

It is an arithmetic number, because the mean of its divisors is an integer number (1454112).

Almost surely, 2^21245334 is an apocalyptic number.

21245334 is an abundant number, since it is smaller than the sum of its proper divisors (25286250).

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

21245334 is a wasteful number, since it uses less digits than its factorization.

21245334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252.

The product of its digits is 2880, while the sum is 24.

The square root of 21245334 is about 4609.2661021035. The cubic root of 21245334 is about 276.9626383769.

Adding to 21245334 its reverse (43354212), we get a palindrome (64599546).

The spelling of 21245334 in words is "twenty-one million, two hundred forty-five thousand, three hundred thirty-four".