13801994 has 16 divisors (see below), whose sum is σ = 22457736. Its totient is φ = 6336000.

The previous prime is 13801993. The next prime is 13802003. The reversal of 13801994 is 49910831.

It can be written as a sum of positive squares in 4 ways, for example, as 13053769 + 748225 = 3613^2 + 865^2 .

It is not an unprimeable number, because it can be changed into a prime (13801993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3557 + ... + 6344.

Almost surely, 2^13801994 is an apocalyptic number.

13801994 is a deficient number, since it is larger than the sum of its proper divisors (8655742).

13801994 is a wasteful number, since it uses less digits than its factorization.

13801994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9961.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 13801994 is about 3715.1034978854. The cubic root of 13801994 is about 239.8725828285.

The spelling of 13801994 in words is "thirteen million, eight hundred one thousand, nine hundred ninety-four".