21230332002 has 24 divisors (see below), whose sum is σ = 50180785200. Its totient is φ = 6433433880.

The previous prime is 21230331979. The next prime is 21230332027. The reversal of 21230332002 is 20023303212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53611752 + ... + 53612147.

It is an arithmetic number, because the mean of its divisors is an integer number (2090866050).

Almost surely, 2^21230332002 is an apocalyptic number.

21230332002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21230332002 is an abundant number, since it is smaller than the sum of its proper divisors (28950453198).

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

21230332002 is a wasteful number, since it uses less digits than its factorization.

21230332002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107223918 (or 107223915 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 21230332002 its reverse (20023303212), we get a palindrome (41253635214).

The spelling of 21230332002 in words is "twenty-one billion, two hundred thirty million, three hundred thirty-two thousand, two".