19081988 has 12 divisors (see below), whose sum is σ = 34470912. Its totient is φ = 9233160.

The previous prime is 19081987. The next prime is 19081991. The reversal of 19081988 is 88918091.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (19081987) 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, 76820 + ... + 77067.

It is an arithmetic number, because the mean of its divisors is an integer number (2872576).

Almost surely, 2^19081988 is an apocalyptic number.

It is an amenable number.

19081988 is a deficient number, since it is larger than the sum of its proper divisors (15388924).

19081988 is a wasteful number, since it uses less digits than its factorization.

19081988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153922 (or 153920 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 44.

The square root of 19081988 is about 4368.2934883087. The cubic root of 19081988 is about 267.2234332599.

The spelling of 19081988 in words is "nineteen million, eighty-one thousand, nine hundred eighty-eight".