21320233002 has 24 divisors (see below), whose sum is σ = 46211198436. Its totient is φ = 7104073536.

The previous prime is 21320232961. The next prime is 21320233031. The reversal of 21320233002 is 20033202312.

It is a happy number.

21320233002 is a `hidden beast` number, since 21 + 320 + 23 + 300 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19229091561 + 2091141441 = 138669^2 + 45729^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173043 + ... + 269414.

Almost surely, 2^21320233002 is an apocalyptic number.

21320233002 is an abundant number, since it is smaller than the sum of its proper divisors (24890965434).

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

21320233002 is a wasteful number, since it uses less digits than its factorization.

21320233002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445142 (or 445139 counting only the distinct ones).

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

Adding to 21320233002 its reverse (20033202312), we get a palindrome (41353435314).

The spelling of 21320233002 in words is "twenty-one billion, three hundred twenty million, two hundred thirty-three thousand, two".