21435112 has 8 divisors (see below), whose sum is σ = 40190850. Its totient is φ = 10717552.

The previous prime is 21435107. The next prime is 21435133. The reversal of 21435112 is 21153412.

It can be written as a sum of positive squares in only one way, i.e., 20848356 + 586756 = 4566^2 + 766^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 21435112.

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 as a sum of consecutive naturals, namely, 1339687 + ... + 1339702.

Almost surely, 2^21435112 is an apocalyptic number.

It is an amenable number.

21435112 is a deficient number, since it is larger than the sum of its proper divisors (18755738).

21435112 is a wasteful number, since it uses less digits than its factorization.

21435112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2679395 (or 2679391 counting only the distinct ones).

The product of its digits is 240, while the sum is 19.

The square root of 21435112 is about 4629.8069074207. The cubic root of 21435112 is about 277.7848688442.

Adding to 21435112 its reverse (21153412), we get a palindrome (42588524).

The spelling of 21435112 in words is "twenty-one million, four hundred thirty-five thousand, one hundred twelve".