21094475 has 6 divisors (see below), whose sum is σ = 26157180. Its totient is φ = 16875560.

The previous prime is 21094457. The next prime is 21094483. The reversal of 21094475 is 57449012.

It is a happy number.

It is not a de Polignac number, because 21094475 - 2¹⁰ = 21093451 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 421865 + ... + 421914.

It is an arithmetic number, because the mean of its divisors is an integer number (4359530).

Almost surely, 2^21094475 is an apocalyptic number.

21094475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21094475 is a deficient number, since it is larger than the sum of its proper divisors (5062705).

21094475 is an equidigital number, since it uses as much as digits as its factorization.

21094475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843789 (or 843784 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 21094475 is about 4592.8721950431. The cubic root of 21094475 is about 276.3055278999.

The spelling of 21094475 in words is "twenty-one million, ninety-four thousand, four hundred seventy-five".