21011604322 has 16 divisors (see below), whose sum is σ = 32890882752. Its totient is φ = 10048064400.

The previous prime is 21011604311. The next prime is 21011604329. The reversal of 21011604322 is 22340611012.

It is a junction number, because it is equal to n+sod(n) for n = 21011604293 and 21011604302.

It is not an unprimeable number, because it can be changed into a prime (21011604329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 773572 + ... + 800272.

It is an arithmetic number, because the mean of its divisors is an integer number (2055680172).

Almost surely, 2^21011604322 is an apocalyptic number.

21011604322 is a deficient number, since it is larger than the sum of its proper divisors (11879278430).

21011604322 is a wasteful number, since it uses less digits than its factorization.

21011604322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43833.

The product of its (nonzero) digits is 576, while the sum is 22.

The spelling of 21011604322 in words is "twenty-one billion, eleven million, six hundred four thousand, three hundred twenty-two".