21932085 has 16 divisors (see below), whose sum is σ = 40104576. Its totient is φ = 10026048.

The previous prime is 21932077. The next prime is 21932143. The reversal of 21932085 is 58023912.

It is a happy number.

It is not a de Polignac number, because 21932085 - 2³ = 21932077 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104334 + ... + 104543.

It is an arithmetic number, because the mean of its divisors is an integer number (2506536).

Almost surely, 2^21932085 is an apocalyptic number.

It is an amenable number.

21932085 is a deficient number, since it is larger than the sum of its proper divisors (18172491).

21932085 is a wasteful number, since it uses less digits than its factorization.

21932085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208892.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 21932085 is about 4683.1704004873. The cubic root of 21932085 is about 279.9153017629.

Adding to 21932085 its reverse (58023912), we get a palindrome (79955997).

It can be divided in two parts, 2193 and 2085, that added together give a triangular number (4278 = T₉₂).

The spelling of 21932085 in words is "twenty-one million, nine hundred thirty-two thousand, eighty-five".