17947543221392 has 40 divisors (see below), whose sum is σ = 36617659995360. Its totient is φ = 8498188846080.

The previous prime is 17947543221389. The next prime is 17947543221481. The reversal of 17947543221392 is 29312234574971.

It is a super-2 number, since 2×17947543221392² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10595834 + ... + 12172377.

It is an arithmetic number, because the mean of its divisors is an integer number (915441499884).

Almost surely, 2^{17947543221392} is an apocalyptic number.

It is an amenable number.

17947543221392 is an abundant number, since it is smaller than the sum of its proper divisors (18670116773968).

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

17947543221392 is a wasteful number, since it uses less digits than its factorization.

17947543221392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22770831 (or 22770825 counting only the distinct ones).

The product of its digits is 22861440, while the sum is 59.

The spelling of 17947543221392 in words is "seventeen trillion, nine hundred forty-seven billion, five hundred forty-three million, two hundred twenty-one thousand, three hundred ninety-two".