19089381 has 16 divisors (see below), whose sum is σ = 26101440. Its totient is φ = 12405120.

The previous prime is 19089359. The next prime is 19089409. The reversal of 19089381 is 18398091.

It is a happy number.

It is not a de Polignac number, because 19089381 - 2⁵ = 19089349 is a prime.

It is a super-2 number, since 2×19089381² = 728808933926322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19089311) 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 in 15 ways as a sum of consecutive naturals, for example, 33265 + ... + 33833.

It is an arithmetic number, because the mean of its divisors is an integer number (1631340).

Almost surely, 2^19089381 is an apocalyptic number.

It is an amenable number.

19089381 is a deficient number, since it is larger than the sum of its proper divisors (7012059).

19089381 is a wasteful number, since it uses less digits than its factorization.

19089381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836.

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 19089381 is about 4369.1396178195. The cubic root of 19089381 is about 267.2579392341.

The spelling of 19089381 in words is "nineteen million, eighty-nine thousand, three hundred eighty-one".