21927084 has 12 divisors (see below), whose sum is σ = 51163224. Its totient is φ = 7309024.

The previous prime is 21927077. The next prime is 21927131. The reversal of 21927084 is 48072912.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 913617 + ... + 913640.

It is an arithmetic number, because the mean of its divisors is an integer number (4263602).

Almost surely, 2^21927084 is an apocalyptic number.

It is an amenable number.

21927084 is an abundant number, since it is smaller than the sum of its proper divisors (29236140).

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

21927084 is a wasteful number, since it uses less digits than its factorization.

21927084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827264 (or 1827262 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 21927084 is about 4682.6364368804. The cubic root of 21927084 is about 279.8940245209.

Adding to 21927084 its reverse (48072912), we get a palindrome (69999996).

The spelling of 21927084 in words is "twenty-one million, nine hundred twenty-seven thousand, eighty-four".