21294474 has 8 divisors (see below), whose sum is σ = 42588960. Its totient is φ = 7098156.

The previous prime is 21294451. The next prime is 21294487. The reversal of 21294474 is 47449212.

It is a sphenic number, since it is the product of 3 distinct primes.

21294474 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1774534 + ... + 1774545.

It is an arithmetic number, because the mean of its divisors is an integer number (5323620).

Almost surely, 2^21294474 is an apocalyptic number.

21294474 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21294474 is a wasteful number, since it uses less digits than its factorization.

21294474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3549084.

The product of its digits is 16128, while the sum is 33.

The square root of 21294474 is about 4614.5935899058. The cubic root of 21294474 is about 277.1760101592.

The spelling of 21294474 in words is "twenty-one million, two hundred ninety-four thousand, four hundred seventy-four".