21293482 has 32 divisors (see below), whose sum is σ = 38102400. Its totient is φ = 8731968.

The previous prime is 21293431. The next prime is 21293483. The reversal of 21293482 is 28439212.

It is not an unprimeable number, because it can be changed into a prime (21293483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72528 + ... + 72820.

It is an arithmetic number, because the mean of its divisors is an integer number (1190700).

Almost surely, 2^21293482 is an apocalyptic number.

21293482 is a deficient number, since it is larger than the sum of its proper divisors (16808918).

21293482 is a wasteful number, since it uses less digits than its factorization.

21293482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510.

The product of its digits is 6912, while the sum is 31.

The square root of 21293482 is about 4614.4861035656. The cubic root of 21293482 is about 277.1717060242.

The spelling of 21293482 in words is "twenty-one million, two hundred ninety-three thousand, four hundred eighty-two".