21033060 has 48 divisors (see below), whose sum is σ = 59107776. Its totient is φ = 5588352.

The previous prime is 21033059. The next prime is 21033071. The reversal of 21033060 is 6033012.

It is a super-2 number, since 2×21033060² = 884779225927200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23379 + ... + 24261.

It is an arithmetic number, because the mean of its divisors is an integer number (1231412).

Almost surely, 2^21033060 is an apocalyptic number.

21033060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21033060 is an abundant number, since it is smaller than the sum of its proper divisors (38074716).

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

21033060 is a wasteful number, since it uses less digits than its factorization.

21033060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1292 (or 1290 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 21033060 is about 4586.1814181299. The cubic root of 21033060 is about 276.0371195612.

Adding to 21033060 its reverse (6033012), we get a palindrome (27066072).

The spelling of 21033060 in words is "twenty-one million, thirty-three thousand, sixty".