31920467181338 has 8 divisors (see below), whose sum is σ = 47882121117588. Its totient is φ = 15959760142144.

The previous prime is 31920467181313. The next prime is 31920467181349. The reversal of 31920467181338 is 83318176402913.

It can be written as a sum of positive squares in 2 ways, for example, as 31888688058049 + 31779123289 = 5647007^2 + 178267^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236639981 + ... + 236774832.

Almost surely, 2^{31920467181338} is an apocalyptic number.

31920467181338 is a deficient number, since it is larger than the sum of its proper divisors (15961653936250).

31920467181338 is a wasteful number, since it uses less digits than its factorization.

31920467181338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473448528.

The product of its (nonzero) digits is 5225472, while the sum is 56.

The spelling of 31920467181338 in words is "thirty-one trillion, nine hundred twenty billion, four hundred sixty-seven million, one hundred eighty-one thousand, three hundred thirty-eight".