19381089 has 48 divisors (see below), whose sum is σ = 32980992. Its totient is φ = 9906624.

The previous prime is 19381079. The next prime is 19381097. The reversal of 19381089 is 98018391.

It is a happy number.

19381089 is nontrivially palindromic in base 4.

It is not a de Polignac number, because 19381089 - 2⁴ = 19381073 is a prime.

It is a super-2 number, since 2×19381089² = 751253221651842, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19381009) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 152544 + ... + 152670.

It is an arithmetic number, because the mean of its divisors is an integer number (687104).

Almost surely, 2^19381089 is an apocalyptic number.

It is an amenable number.

19381089 is a deficient number, since it is larger than the sum of its proper divisors (13599903).

19381089 is a wasteful number, since it uses less digits than its factorization.

19381089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206 (or 193 counting only the distinct ones).

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

The square root of 19381089 is about 4402.3958250026. The cubic root of 19381089 is about 268.6124008796.

The spelling of 19381089 in words is "nineteen million, three hundred eighty-one thousand, eighty-nine".