21032084 has 12 divisors (see below), whose sum is σ = 37430400. Its totient is φ = 10337688.

The previous prime is 21032083. The next prime is 21032087. The reversal of 21032084 is 48023012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21032083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44324 + ... + 44795.

It is an arithmetic number, because the mean of its divisors is an integer number (3119200).

Almost surely, 2^21032084 is an apocalyptic number.

It is an amenable number.

21032084 is a deficient number, since it is larger than the sum of its proper divisors (16398316).

21032084 is a wasteful number, since it uses less digits than its factorization.

21032084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89182 (or 89180 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 21032084 is about 4586.0750102893. The cubic root of 21032084 is about 276.0328498322.

Adding to 21032084 its reverse (48023012), we get a palindrome (69055096).

The spelling of 21032084 in words is "twenty-one million, thirty-two thousand, eighty-four".