21103032 has 32 divisors (see below), whose sum is σ = 52955280. Its totient is φ = 7008000.

The previous prime is 21103021. The next prime is 21103051. The reversal of 21103032 is 23030112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 21102999 and 21103017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5532 + ... + 8532.

Almost surely, 2^21103032 is an apocalyptic number.

It is an amenable number.

21103032 is an abundant number, since it is smaller than the sum of its proper divisors (31852248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21103032 is a wasteful number, since it uses less digits than its factorization.

21103032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3303 (or 3299 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 21103032 is about 4593.8036527479. The cubic root of 21103032 is about 276.3428840761.

Adding to 21103032 its reverse (23030112), we get a palindrome (44133144).

The spelling of 21103032 in words is "twenty-one million, one hundred three thousand, thirty-two".