21692085 has 32 divisors (see below), whose sum is σ = 37003392. Its totient is φ = 10813440.

The previous prime is 21692071. The next prime is 21692093. The reversal of 21692085 is 58029612.

It is not a de Polignac number, because 21692085 - 2¹¹ = 21690037 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65370 + ... + 65700.

It is an arithmetic number, because the mean of its divisors is an integer number (1156356).

Almost surely, 2^21692085 is an apocalyptic number.

It is an amenable number.

21692085 is a deficient number, since it is larger than the sum of its proper divisors (15311307).

21692085 is a wasteful number, since it uses less digits than its factorization.

21692085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 21692085 is about 4657.4762479266. The cubic root of 21692085 is about 278.8905288591.

The spelling of 21692085 in words is "twenty-one million, six hundred ninety-two thousand, eighty-five".