13381630994 has 4 divisors (see below), whose sum is σ = 20072446494. Its totient is φ = 6690815496.

The previous prime is 13381630993. The next prime is 13381631033. The reversal of 13381630994 is 49903618331.

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., 9955050625 + 3426580369 = 99775^2 + 58537^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13381630993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3345407747 + ... + 3345407750.

Almost surely, 2^13381630994 is an apocalyptic number.

13381630994 is a deficient number, since it is larger than the sum of its proper divisors (6690815500).

13381630994 is an equidigital number, since it uses as much as digits as its factorization.

13381630994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6690815499.

The product of its (nonzero) digits is 419904, while the sum is 47.

Adding to 13381630994 its sum of digits (47), we get a square (13381631041 = 115679²).

The spelling of 13381630994 in words is "thirteen billion, three hundred eighty-one million, six hundred thirty thousand, nine hundred ninety-four".