21835612 has 12 divisors (see below), whose sum is σ = 38254216. Its totient is φ = 10905840.

The previous prime is 21835609. The next prime is 21835613. The reversal of 21835612 is 21653812.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21835613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2062 + ... + 6922.

Almost surely, 2^21835612 is an apocalyptic number.

It is an amenable number.

21835612 is a deficient number, since it is larger than the sum of its proper divisors (16418604).

21835612 is a wasteful number, since it uses less digits than its factorization.

21835612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5988 (or 5986 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 21835612 is about 4672.8590819754. The cubic root of 21835612 is about 279.5042759279.

The spelling of 21835612 in words is "twenty-one million, eight hundred thirty-five thousand, six hundred twelve".