21248294 has 16 divisors (see below), whose sum is σ = 32421600. Its totient is φ = 10442880.

The previous prime is 21248287. The next prime is 21248303. The reversal of 21248294 is 49284212.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21248294.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33359 + ... + 33989.

It is an arithmetic number, because the mean of its divisors is an integer number (2026350).

Almost surely, 2^21248294 is an apocalyptic number.

21248294 is a deficient number, since it is larger than the sum of its proper divisors (11173306).

21248294 is a wasteful number, since it uses less digits than its factorization.

21248294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895.

The product of its digits is 9216, while the sum is 32.

The square root of 21248294 is about 4609.5871832519. The cubic root of 21248294 is about 276.9755003594.

The spelling of 21248294 in words is "twenty-one million, two hundred forty-eight thousand, two hundred ninety-four".