19338881 has 2 divisors, whose sum is σ = 19338882. Its totient is φ = 19338880.

The previous prime is 19338857. The next prime is 19338919. The reversal of 19338881 is 18883391.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11498881 + 7840000 = 3391^2 + 2800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19338881 is a prime.

It is a super-2 number, since 2×19338881² = 747984636664322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19338581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9669440 + 9669441.

It is an arithmetic number, because the mean of its divisors is an integer number (9669441).

Almost surely, 2^19338881 is an apocalyptic number.

It is an amenable number.

19338881 is a deficient number, since it is larger than the sum of its proper divisors (1).

19338881 is an equidigital number, since it uses as much as digits as its factorization.

19338881 is an evil number, because the sum of its binary digits is even.

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

The square root of 19338881 is about 4397.5994587957. The cubic root of 19338881 is about 268.4172650868.

The spelling of 19338881 in words is "nineteen million, three hundred thirty-eight thousand, eight hundred eighty-one".