21601333002 has 16 divisors (see below), whose sum is σ = 43444023840. Its totient is φ = 7160218032.

The previous prime is 21601333001. The next prime is 21601333009. The reversal of 21601333002 is 20033310612.

It is a self number, because there is not a number n which added to its sum of digits gives 21601333002.

It is not an unprimeable number, because it can be changed into a prime (21601333001) 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, 10055413 + ... + 10057560.

It is an arithmetic number, because the mean of its divisors is an integer number (2715251490).

Almost surely, 2^21601333002 is an apocalyptic number.

21601333002 is an abundant number, since it is smaller than the sum of its proper divisors (21842690838).

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

21601333002 is a wasteful number, since it uses less digits than its factorization.

21601333002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20113157.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21601333002 its reverse (20033310612), we get a palindrome (41634643614).

The spelling of 21601333002 in words is "twenty-one billion, six hundred one million, three hundred thirty-three thousand, two".