21683095 has 16 divisors (see below), whose sum is σ = 30300480. Its totient is φ = 14586624.

The previous prime is 21683093. The next prime is 21683099. The reversal of 21683095 is 59038612.

It is a cyclic number.

It is not a de Polignac number, because 21683095 - 2¹ = 21683093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21683095.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21683093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3990 + ... + 7699.

It is an arithmetic number, because the mean of its divisors is an integer number (1893780).

Almost surely, 2^21683095 is an apocalyptic number.

21683095 is a deficient number, since it is larger than the sum of its proper divisors (8617385).

21683095 is a wasteful number, since it uses less digits than its factorization.

21683095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11754.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 21683095 is about 4656.5110329516. The cubic root of 21683095 is about 278.8519960287.

The spelling of 21683095 in words is "twenty-one million, six hundred eighty-three thousand, ninety-five".