13331999938 has 4 divisors (see below), whose sum is σ = 19997999910. Its totient is φ = 6665999968.

The previous prime is 13331999927. The next prime is 13331999939. The reversal of 13331999938 is 83999913331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 9819422649 + 3512577289 = 99093^2 + 59267^2 .

It is not an unprimeable number, because it can be changed into a prime (13331999939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3332999983 + ... + 3332999986.

Almost surely, 2^13331999938 is an apocalyptic number.

13331999938 is a deficient number, since it is larger than the sum of its proper divisors (6665999972).

13331999938 is an equidigital number, since it uses as much as digits as its factorization.

13331999938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6665999971.

The product of its digits is 4251528, while the sum is 58.

The spelling of 13331999938 in words is "thirteen billion, three hundred thirty-one million, nine hundred ninety-nine thousand, nine hundred thirty-eight".