21445294 has 16 divisors (see below), whose sum is σ = 34756848. Its totient is φ = 9865152.

The previous prime is 21445247. The next prime is 21445327. The reversal of 21445294 is 49254412.

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, 7834 + ... + 10210.

It is an arithmetic number, because the mean of its divisors is an integer number (2172303).

Almost surely, 2^21445294 is an apocalyptic number.

21445294 is a deficient number, since it is larger than the sum of its proper divisors (13311554).

21445294 is a wasteful number, since it uses less digits than its factorization.

21445294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2739.

The product of its digits is 11520, while the sum is 31.

The square root of 21445294 is about 4630.9063907620. The cubic root of 21445294 is about 277.8288458760.

The spelling of 21445294 in words is "twenty-one million, four hundred forty-five thousand, two hundred ninety-four".