21932084 has 6 divisors (see below), whose sum is σ = 38381154. Its totient is φ = 10966040.

The previous prime is 21932077. The next prime is 21932143. The reversal of 21932084 is 48023912.

It can be written as a sum of positive squares in only one way, i.e., 21883684 + 48400 = 4678^2 + 220^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2741507 + ... + 2741514.

It is an arithmetic number, because the mean of its divisors is an integer number (6396859).

Almost surely, 2^21932084 is an apocalyptic number.

It is an amenable number.

21932084 is a deficient number, since it is larger than the sum of its proper divisors (16449070).

21932084 is a wasteful number, since it uses less digits than its factorization.

21932084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5483025 (or 5483023 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 21932084 is about 4683.1702937220. The cubic root of 21932084 is about 279.9152975086.

Adding to 21932084 its reverse (48023912), we get a palindrome (69955996).

The spelling of 21932084 in words is "twenty-one million, nine hundred thirty-two thousand, eighty-four".