21000323002 has 24 divisors (see below), whose sum is σ = 33730149600. Its totient is φ = 9778857768.

The previous prime is 21000322999. The next prime is 21000323011. The reversal of 21000323002 is 20032300012.

It is a happy number.

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, 52899 + ... + 211657.

It is an arithmetic number, because the mean of its divisors is an integer number (1405422900).

Almost surely, 2^21000323002 is an apocalyptic number.

21000323002 is a deficient number, since it is larger than the sum of its proper divisors (12729826598).

21000323002 is a wasteful number, since it uses less digits than its factorization.

21000323002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158898 (or 158839 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 21000323002 its reverse (20032300012), we get a palindrome (41032623014).

The spelling of 21000323002 in words is "twenty-one billion, three hundred twenty-three thousand, two".