19001081 has 8 divisors (see below), whose sum is σ = 21234528. Its totient is φ = 16852000.

The previous prime is 19001077. The next prime is 19001089. The reversal of 19001081 is 18010091.

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

It is not a de Polignac number, because 19001081 - 2² = 19001077 is a prime.

It is a super-2 number, since 2×19001081² = 722082158337122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19001089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20615 + ... + 21516.

It is an arithmetic number, because the mean of its divisors is an integer number (2654316).

Almost surely, 2^19001081 is an apocalyptic number.

19001081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

19001081 is a deficient number, since it is larger than the sum of its proper divisors (2233447).

19001081 is a wasteful number, since it uses less digits than its factorization.

19001081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42183.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 19001081 is about 4359.0229409812. The cubic root of 19001081 is about 266.8452253765.

It can be divided in two parts, 190010 and 81, that added together give a palindrome (190091).

The spelling of 19001081 in words is "nineteen million, one thousand, eighty-one".