21003023322 has 24 divisors (see below), whose sum is σ = 45582544800. Its totient is φ = 6989316360.

The previous prime is 21003023297. The next prime is 21003023333. The reversal of 21003023322 is 22332030012.

It is a happy number.

It is a super-2 number, since 2×21003023322² (a number of 21 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 21003023295 and 21003023304.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 963204 + ... + 984767.

It is an arithmetic number, because the mean of its divisors is an integer number (1899272700).

Almost surely, 2^21003023322 is an apocalyptic number.

21003023322 is an abundant number, since it is smaller than the sum of its proper divisors (24579521478).

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

21003023322 is a wasteful number, since it uses less digits than its factorization.

21003023322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948578 (or 1948575 counting only the distinct ones).

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

Adding to 21003023322 its reverse (22332030012), we get a palindrome (43335053334).

The spelling of 21003023322 in words is "twenty-one billion, three million, twenty-three thousand, three hundred twenty-two".