21023032 has 8 divisors (see below), whose sum is σ = 39418200. Its totient is φ = 10511512.

The previous prime is 21023017. The next prime is 21023047. The reversal of 21023032 is 23032012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21023017) and next prime (21023047).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1313932 + ... + 1313947.

It is an arithmetic number, because the mean of its divisors is an integer number (4927275).

Almost surely, 2^21023032 is an apocalyptic number.

It is an amenable number.

21023032 is a deficient number, since it is larger than the sum of its proper divisors (18395168).

21023032 is a wasteful number, since it uses less digits than its factorization.

21023032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2627885 (or 2627881 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 21023032 is about 4585.0880035175. The cubic root of 21023032 is about 275.9932435509.

Adding to 21023032 its reverse (23032012), we get a palindrome (44055044).

The spelling of 21023032 in words is "twenty-one million, twenty-three thousand, thirty-two".