21032260 has 24 divisors (see below), whose sum is σ = 45593856. Its totient is φ = 8141280.

The previous prime is 21032237. The next prime is 21032267. The reversal of 21032260 is 6223012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21032267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16342 + ... + 17581.

It is an arithmetic number, because the mean of its divisors is an integer number (1899744).

Almost surely, 2^21032260 is an apocalyptic number.

21032260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21032260 is an abundant number, since it is smaller than the sum of its proper divisors (24561596).

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

21032260 is a wasteful number, since it uses less digits than its factorization.

21032260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33963 (or 33961 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 21032260 is about 4586.0941987709. The cubic root of 21032260 is about 276.0336197931.

Adding to 21032260 its reverse (6223012), we get a palindrome (27255272).

The spelling of 21032260 in words is "twenty-one million, thirty-two thousand, two hundred sixty".