19081938 has 16 divisors (see below), whose sum is σ = 39051936. Its totient is φ = 6212640.

The previous prime is 19081891. The next prime is 19081943. The reversal of 19081938 is 83918091.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 19081896 and 19081905.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 36723 + ... + 37238.

It is an arithmetic number, because the mean of its divisors is an integer number (2440746).

Almost surely, 2^19081938 is an apocalyptic number.

19081938 is an abundant number, since it is smaller than the sum of its proper divisors (19969998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19081938 is a wasteful number, since it uses less digits than its factorization.

19081938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74009.

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

The square root of 19081938 is about 4368.2877652462. The cubic root of 19081938 is about 267.2231998603.

It can be divided in two parts, 190 and 81938, that added together give a palindrome (82128).

The spelling of 19081938 in words is "nineteen million, eighty-one thousand, nine hundred thirty-eight".