21282474 has 24 divisors (see below), whose sum is σ = 43763328. Its totient is φ = 6899760.

The previous prime is 21282467. The next prime is 21282497. The reversal of 21282474 is 47428212.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 6919 + ... + 9509.

It is an arithmetic number, because the mean of its divisors is an integer number (1823472).

Almost surely, 2^21282474 is an apocalyptic number.

21282474 is an abundant number, since it is smaller than the sum of its proper divisors (22480854).

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

21282474 is a wasteful number, since it uses less digits than its factorization.

21282474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2670 (or 2633 counting only the distinct ones).

The product of its digits is 7168, while the sum is 30.

The square root of 21282474 is about 4613.2931838330. The cubic root of 21282474 is about 277.1239350355.

The spelling of 21282474 in words is "twenty-one million, two hundred eighty-two thousand, four hundred seventy-four".