21634112 has 14 divisors (see below), whose sum is σ = 42930318. Its totient is φ = 10817024.

The previous prime is 21634111. The next prime is 21634121. The reversal of 21634112 is 21143612.

It can be written as a sum of positive squares in only one way, i.e., 11999296 + 9634816 = 3464^2 + 3104^2 .

It is not an unprimeable number, because it can be changed into a prime (21634111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 168953 + ... + 169080.

Almost surely, 2^21634112 is an apocalyptic number.

It is an amenable number.

21634112 is a deficient number, since it is larger than the sum of its proper divisors (21296206).

21634112 is an equidigital number, since it uses as much as digits as its factorization.

21634112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338045 (or 338035 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 21634112 is about 4651.2484345603. The cubic root of 21634112 is about 278.6418583513.

Adding to 21634112 its reverse (21143612), we get a palindrome (42777724).

The spelling of 21634112 in words is "twenty-one million, six hundred thirty-four thousand, one hundred twelve".