21032104 has 16 divisors (see below), whose sum is σ = 40024800. Its totient is φ = 10358832.

The previous prime is 21032087. The next prime is 21032119. The reversal of 21032104 is 40123012.

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, 19084 + ... + 20155.

It is an arithmetic number, because the mean of its divisors is an integer number (2501550).

Almost surely, 2^21032104 is an apocalyptic number.

It is an amenable number.

21032104 is a deficient number, since it is larger than the sum of its proper divisors (18992696).

21032104 is a wasteful number, since it uses less digits than its factorization.

21032104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39312 (or 39308 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 21032104 is about 4586.0771908026. The cubic root of 21032104 is about 276.0329373280.

Adding to 21032104 its reverse (40123012), we get a palindrome (61155116).

The spelling of 21032104 in words is "twenty-one million, thirty-two thousand, one hundred four".