21004002322 has 12 divisors (see below), whose sum is σ = 32555113758. Its totient is φ = 10163226000.

The previous prime is 21004002281. The next prime is 21004002329. The reversal of 21004002322 is 22320040012.

It can be written as a sum of positive squares in only one way, i.e., 20079173401 + 924828921 = 141701^2 + 30411^2 .

It is a super-2 number, since 2×21004002322² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21004002296 and 21004002305.

It is not an unprimeable number, because it can be changed into a prime (21004002329) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5462179 + ... + 5466022.

Almost surely, 2^21004002322 is an apocalyptic number.

21004002322 is a deficient number, since it is larger than the sum of its proper divisors (11551111436).

21004002322 is a wasteful number, since it uses less digits than its factorization.

21004002322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10928265 (or 10928234 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 21004002322 its reverse (22320040012), we get a palindrome (43324042334).

The spelling of 21004002322 in words is "twenty-one billion, four million, two thousand, three hundred twenty-two".