21833804 has 6 divisors (see below), whose sum is σ = 38209164. Its totient is φ = 10916900.

The previous prime is 21833767. The next prime is 21833807. The reversal of 21833804 is 40833812.

It is a happy number.

It is a super-2 number, since 2×21833804² = 953429994220832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21833807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2729222 + ... + 2729229.

It is an arithmetic number, because the mean of its divisors is an integer number (6368194).

Almost surely, 2^21833804 is an apocalyptic number.

It is an amenable number.

21833804 is a deficient number, since it is larger than the sum of its proper divisors (16375360).

21833804 is a wasteful number, since it uses less digits than its factorization.

21833804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5458455 (or 5458453 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 21833804 is about 4672.6656203927. The cubic root of 21833804 is about 279.4965613486.

The spelling of 21833804 in words is "twenty-one million, eight hundred thirty-three thousand, eight hundred four".