21032036 has 12 divisors (see below), whose sum is σ = 36908928. Its totient is φ = 10486632.

The previous prime is 21032023. The next prime is 21032059. The reversal of 21032036 is 63023012.

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, 5696 + ... + 8631.

It is an arithmetic number, because the mean of its divisors is an integer number (3075744).

Almost surely, 2^21032036 is an apocalyptic number.

It is an amenable number.

21032036 is a deficient number, since it is larger than the sum of its proper divisors (15876892).

21032036 is a wasteful number, since it uses less digits than its factorization.

21032036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14698 (or 14696 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 21032036 is about 4586.0697770531. The cubic root of 21032036 is about 276.0326398422.

Adding to 21032036 its reverse (63023012), we get a palindrome (84055048).

The spelling of 21032036 in words is "twenty-one million, thirty-two thousand, thirty-six".