19201081 has 2 divisors, whose sum is σ = 19201082. Its totient is φ = 19201080.

The previous prime is 19201069. The next prime is 19201087. The reversal of 19201081 is 18010291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13075456 + 6125625 = 3616^2 + 2475^2 .

It is a cyclic number.

It is not a de Polignac number, because 19201081 - 2⁷ = 19200953 is a prime.

It is a super-2 number, since 2×19201081² = 737363023137122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19201087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9600540 + 9600541.

It is an arithmetic number, because the mean of its divisors is an integer number (9600541).

Almost surely, 2^19201081 is an apocalyptic number.

It is an amenable number.

19201081 is a deficient number, since it is larger than the sum of its proper divisors (1).

19201081 is an equidigital number, since it uses as much as digits as its factorization.

19201081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 19201081 is about 4381.9038099894. The cubic root of 19201081 is about 267.7782053345.

The spelling of 19201081 in words is "nineteen million, two hundred one thousand, eighty-one".