21835896 has 16 divisors (see below), whose sum is σ = 54589800. Its totient is φ = 7278624.

The previous prime is 21835867. The next prime is 21835907. The reversal of 21835896 is 69853812.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

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 in 3 ways as a sum of consecutive naturals, for example, 454891 + ... + 454938.

Almost surely, 2^21835896 is an apocalyptic number.

It is an amenable number.

21835896 is an abundant number, since it is smaller than the sum of its proper divisors (32753904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21835896 is a wasteful number, since it uses less digits than its factorization.

21835896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909838 (or 909834 counting only the distinct ones).

The product of its digits is 103680, while the sum is 42.

The square root of 21835896 is about 4672.8894701245. The cubic root of 21835896 is about 279.5054876926.

The spelling of 21835896 in words is "twenty-one million, eight hundred thirty-five thousand, eight hundred ninety-six".