21695834 has 16 divisors (see below), whose sum is σ = 34840800. Its totient is φ = 10101744.

The previous prime is 21695833. The next prime is 21695837. The reversal of 21695834 is 43859612.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (21695833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2597 + ... + 7080.

It is an arithmetic number, because the mean of its divisors is an integer number (2177550).

Almost surely, 2^21695834 is an apocalyptic number.

21695834 is a deficient number, since it is larger than the sum of its proper divisors (13144966).

21695834 is a wasteful number, since it uses less digits than its factorization.

21695834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9757.

The product of its digits is 51840, while the sum is 38.

The square root of 21695834 is about 4657.8787017268. The cubic root of 21695834 is about 278.9065946325.

The spelling of 21695834 in words is "twenty-one million, six hundred ninety-five thousand, eight hundred thirty-four".