19238081 has 2 divisors, whose sum is σ = 19238082. Its totient is φ = 19238080.

The previous prime is 19238053. The next prime is 19238123. The reversal of 19238081 is 18083291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18318400 + 919681 = 4280^2 + 959^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19238081 is a prime.

It is a super-2 number, since 2×19238081² = 740207521125122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19238041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9619040 + 9619041.

It is an arithmetic number, because the mean of its divisors is an integer number (9619041).

Almost surely, 2^19238081 is an apocalyptic number.

It is an amenable number.

19238081 is a deficient number, since it is larger than the sum of its proper divisors (1).

19238081 is an equidigital number, since it uses as much as digits as its factorization.

19238081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 19238081 is about 4386.1236872665. The cubic root of 19238081 is about 267.9500955939.

The spelling of 19238081 in words is "nineteen million, two hundred thirty-eight thousand, eighty-one".