21833522 has 4 divisors (see below), whose sum is σ = 32750286. Its totient is φ = 10916760.

The previous prime is 21833503. The next prime is 21833531. The reversal of 21833522 is 22533812.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14055001 + 7778521 = 3749^2 + 2789^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21833491 and 21833500.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5458379 + ... + 5458382.

Almost surely, 2^21833522 is an apocalyptic number.

21833522 is a deficient number, since it is larger than the sum of its proper divisors (10916764).

21833522 is a wasteful number, since it uses less digits than its factorization.

21833522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10916763.

The product of its digits is 2880, while the sum is 26.

The square root of 21833522 is about 4672.6354447999. The cubic root of 21833522 is about 279.4953580407.

The spelling of 21833522 in words is "twenty-one million, eight hundred thirty-three thousand, five hundred twenty-two".