19106381 has 16 divisors (see below), whose sum is σ = 23237760. Its totient is φ = 15344640.

The previous prime is 19106357. The next prime is 19106401. The reversal of 19106381 is 18360191.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19106381 is a prime.

It is a super-2 number, since 2×19106381² = 730107589834322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19106081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12161 + ... + 13641.

It is an arithmetic number, because the mean of its divisors is an integer number (1452360).

Almost surely, 2^19106381 is an apocalyptic number.

It is an amenable number.

19106381 is a deficient number, since it is larger than the sum of its proper divisors (4131379).

19106381 is a wasteful number, since it uses less digits than its factorization.

19106381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 19106381 is about 4371.0846480021. The cubic root of 19106381 is about 267.3372509893.

The spelling of 19106381 in words is "nineteen million, one hundred six thousand, three hundred eighty-one".