21294675 has 72 divisors (see below), whose sum is σ = 40854528. Its totient is φ = 10584000.

The previous prime is 21294653. The next prime is 21294709. The reversal of 21294675 is 57649212.

It is not a de Polignac number, because 21294675 - 2⁸ = 21294419 is a prime.

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 71 ways as a sum of consecutive naturals, for example, 299890 + ... + 299960.

It is an arithmetic number, because the mean of its divisors is an integer number (567424).

Almost surely, 2^21294675 is an apocalyptic number.

21294675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21294675 is a deficient number, since it is larger than the sum of its proper divisors (19559853).

21294675 is a wasteful number, since it uses less digits than its factorization.

21294675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 153 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 21294675 is about 4614.6153685871. The cubic root of 21294675 is about 277.1768822509.

The spelling of 21294675 in words is "twenty-one million, two hundred ninety-four thousand, six hundred seventy-five".