19013081 has 2 divisors, whose sum is σ = 19013082. Its totient is φ = 19013080.

The previous prime is 19013077. The next prime is 19013083. The reversal of 19013081 is 18031091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19009600 + 3481 = 4360^2 + 59^2 .

It is a cyclic number.

It is not a de Polignac number, because 19013081 - 2² = 19013077 is a prime.

It is a super-2 number, since 2×19013081² = 722994498225122, which contains 22 as substring.

Together with 19013083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19013083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9506540 + 9506541.

It is an arithmetic number, because the mean of its divisors is an integer number (9506541).

Almost surely, 2^19013081 is an apocalyptic number.

It is an amenable number.

19013081 is a deficient number, since it is larger than the sum of its proper divisors (1).

19013081 is an equidigital number, since it uses as much as digits as its factorization.

19013081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 19013081 is about 4360.3991789743. The cubic root of 19013081 is about 266.9013883012.

The spelling of 19013081 in words is "nineteen million, thirteen thousand, eighty-one".