21069974722 has 8 divisors (see below), whose sum is σ = 33268381200. Its totient is φ = 9980514324.

The previous prime is 21069974713. The next prime is 21069974747. The reversal of 21069974722 is 22747996012.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 277236472 + ... + 277236547.

It is an arithmetic number, because the mean of its divisors is an integer number (4158547650).

Almost surely, 2^21069974722 is an apocalyptic number.

21069974722 is a deficient number, since it is larger than the sum of its proper divisors (12198406478).

21069974722 is a wasteful number, since it uses less digits than its factorization.

21069974722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554473040.

The product of its (nonzero) digits is 762048, while the sum is 49.

The spelling of 21069974722 in words is "twenty-one billion, sixty-nine million, nine hundred seventy-four thousand, seven hundred twenty-two".