13893818 has 4 divisors (see below), whose sum is σ = 20840730. Its totient is φ = 6946908.

The previous prime is 13893799. The next prime is 13893821. The reversal of 13893818 is 81839831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81839831 = 47 ⋅1741273.

It can be written as a sum of positive squares in only one way, i.e., 9284209 + 4609609 = 3047^2 + 2147^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3473453 + ... + 3473456.

Almost surely, 2^13893818 is an apocalyptic number.

13893818 is a deficient number, since it is larger than the sum of its proper divisors (6946912).

13893818 is an equidigital number, since it uses as much as digits as its factorization.

13893818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6946911.

The product of its digits is 41472, while the sum is 41.

The square root of 13893818 is about 3727.4412134868. The cubic root of 13893818 is about 240.4033610548.

The spelling of 13893818 in words is "thirteen million, eight hundred ninety-three thousand, eight hundred eighteen".