19020766081 has 8 divisors (see below), whose sum is σ = 20140964064. Its totient is φ = 17900715840.

The previous prime is 19020766049. The next prime is 19020766109. The reversal of 19020766081 is 18066702091.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19020766081 - 2⁵ = 19020766049 is a prime.

It is a super-2 number, since 2×19020766081² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (19020766001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335526 + ... + 388096.

It is an arithmetic number, because the mean of its divisors is an integer number (2517620508).

Almost surely, 2^19020766081 is an apocalyptic number.

It is an amenable number.

19020766081 is a deficient number, since it is larger than the sum of its proper divisors (1120197983).

19020766081 is a wasteful number, since it uses less digits than its factorization.

19020766081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73871.

The product of its (nonzero) digits is 36288, while the sum is 40.

The spelling of 19020766081 in words is "nineteen billion, twenty million, seven hundred sixty-six thousand, eighty-one".