21024112 has 20 divisors (see below), whose sum is σ = 41252320. Its totient is φ = 10378368.

The previous prime is 21024097. The next prime is 21024137. The reversal of 21024112 is 21142012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21024092 and 21024101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7053 + ... + 9580.

It is an arithmetic number, because the mean of its divisors is an integer number (2062616).

Almost surely, 2^21024112 is an apocalyptic number.

It is an amenable number.

21024112 is a deficient number, since it is larger than the sum of its proper divisors (20228208).

21024112 is a wasteful number, since it uses less digits than its factorization.

21024112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16720 (or 16714 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 21024112 is about 4585.2057750989. The cubic root of 21024112 is about 275.9979695993.

Adding to 21024112 its reverse (21142012), we get a palindrome (42166124).

The spelling of 21024112 in words is "twenty-one million, twenty-four thousand, one hundred twelve".