21174084 has 18 divisors (see below), whose sum is σ = 53523470. Its totient is φ = 7058016.

The previous prime is 21174059. The next prime is 21174121. The reversal of 21174084 is 48047112.

It can be written as a sum of positive squares in only one way, i.e., 18249984 + 2924100 = 4272^2 + 1710^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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, 294049 + ... + 294120.

Almost surely, 2^21174084 is an apocalyptic number.

It is an amenable number.

21174084 is an abundant number, since it is smaller than the sum of its proper divisors (32349386).

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

21174084 is a wasteful number, since it uses less digits than its factorization.

21174084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588179 (or 588174 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 21174084 is about 4601.5306149150. The cubic root of 21174084 is about 276.6526771527.

The spelling of 21174084 in words is "twenty-one million, one hundred seventy-four thousand, eighty-four".