21845675 has 12 divisors (see below), whose sum is σ = 27173856. Its totient is φ = 17421600.

The previous prime is 21845627. The next prime is 21845689. The reversal of 21845675 is 57654812.

It is not a de Polignac number, because 21845675 - 2¹⁰ = 21844651 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7985 + ... + 10365.

It is an arithmetic number, because the mean of its divisors is an integer number (2264488).

Almost surely, 2^21845675 is an apocalyptic number.

21845675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21845675 is a deficient number, since it is larger than the sum of its proper divisors (5328181).

21845675 is a wasteful number, since it uses less digits than its factorization.

21845675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2758 (or 2753 counting only the distinct ones).

The product of its digits is 67200, while the sum is 38.

The square root of 21845675 is about 4673.9357077307. The cubic root of 21845675 is about 279.5472060973.

The spelling of 21845675 in words is "twenty-one million, eight hundred forty-five thousand, six hundred seventy-five".