19080381 has 4 divisors (see below), whose sum is σ = 25440512. Its totient is φ = 12720252.

The previous prime is 19080379. The next prime is 19080403. The reversal of 19080381 is 18308091.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 19080381 - 2¹ = 19080379 is a prime.

It is a super-2 number, since 2×19080381² = 728121878210322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19080301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3180061 + ... + 3180066.

It is an arithmetic number, because the mean of its divisors is an integer number (6360128).

Almost surely, 2^19080381 is an apocalyptic number.

It is an amenable number.

19080381 is a deficient number, since it is larger than the sum of its proper divisors (6360131).

19080381 is an equidigital number, since it uses as much as digits as its factorization.

19080381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6360130.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 19080381 is about 4368.1095453296. The cubic root of 19080381 is about 267.2159315937.

The spelling of 19080381 in words is "nineteen million, eighty thousand, three hundred eighty-one".