21369004722 has 48 divisors (see below), whose sum is σ = 49887190080. Its totient is φ = 6571626336.

The previous prime is 21369004681. The next prime is 21369004747. The reversal of 21369004722 is 22740096312.

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 23 ways as a sum of consecutive naturals, for example, 441979 + ... + 487937.

It is an arithmetic number, because the mean of its divisors is an integer number (1039316460).

Almost surely, 2^21369004722 is an apocalyptic number.

21369004722 is an abundant number, since it is smaller than the sum of its proper divisors (28518185358).

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

21369004722 is a wasteful number, since it uses less digits than its factorization.

21369004722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47967 (or 47964 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The spelling of 21369004722 in words is "twenty-one billion, three hundred sixty-nine million, four thousand, seven hundred twenty-two".