21675414 has 32 divisors (see below), whose sum is σ = 44870400. Its totient is φ = 6975072.

The previous prime is 21675359. The next prime is 21675419. The reversal of 21675414 is 41457612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21675419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35887 + ... + 36485.

It is an arithmetic number, because the mean of its divisors is an integer number (1402200).

Almost surely, 2^21675414 is an apocalyptic number.

21675414 is an abundant number, since it is smaller than the sum of its proper divisors (23194986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21675414 is a wasteful number, since it uses less digits than its factorization.

21675414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804.

The product of its digits is 6720, while the sum is 30.

The square root of 21675414 is about 4655.6862007657. The cubic root of 21675414 is about 278.8190653802.

The spelling of 21675414 in words is "twenty-one million, six hundred seventy-five thousand, four hundred fourteen".