21473707722 has 8 divisors (see below), whose sum is σ = 42947415456. Its totient is φ = 7157902572.

The previous prime is 21473707711. The next prime is 21473707733. The reversal of 21473707722 is 22770737412.

It is an interprime number because it is at equal distance from previous prime (21473707711) and next prime (21473707733).

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

21473707722 is an admirable number.

It is a super-2 number, since 2×21473707722² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1789475638 + ... + 1789475649.

It is an arithmetic number, because the mean of its divisors is an integer number (5368426932).

Almost surely, 2^21473707722 is an apocalyptic number.

21473707722 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21473707722 is a wasteful number, since it uses less digits than its factorization.

21473707722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3578951292.

The product of its (nonzero) digits is 230496, while the sum is 42.

The spelling of 21473707722 in words is "twenty-one billion, four hundred seventy-three million, seven hundred seven thousand, seven hundred twenty-two".