21133002 has 32 divisors (see below), whose sum is σ = 46597824. Its totient is φ = 6336000.

The previous prime is 21132983. The next prime is 21133003. The reversal of 21133002 is 20033112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21133003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4752 + ... + 8052.

It is an arithmetic number, because the mean of its divisors is an integer number (1456182).

Almost surely, 2^21133002 is an apocalyptic number.

21133002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21133002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23298912).

21133002 is an abundant number, since it is smaller than the sum of its proper divisors (25464822).

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

21133002 is a wasteful number, since it uses less digits than its factorization.

21133002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3414.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 21133002 is about 4597.0644981336. The cubic root of 21133002 is about 276.4736406217.

Adding to 21133002 its reverse (20033112), we get a palindrome (41166114).

It can be divided in two parts, 2113 and 3002, that added together give a palindrome (5115).

The spelling of 21133002 in words is "twenty-one million, one hundred thirty-three thousand, two".