19009992 has 32 divisors (see below), whose sum is σ = 47688480. Its totient is φ = 6314880.

The previous prime is 19009981. The next prime is 19010009. The reversal of 19009992 is 29990091.

It is a happy number.

It is a super-2 number, since 2×19009992² = 722759591680128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19009992.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6748 + ... + 9140.

It is an arithmetic number, because the mean of its divisors is an integer number (1490265).

Almost surely, 2^19009992 is an apocalyptic number.

19009992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19009992 is an abundant number, since it is smaller than the sum of its proper divisors (28678488).

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

19009992 is a wasteful number, since it uses less digits than its factorization.

19009992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2733 (or 2729 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 39.

The square root of 19009992 is about 4360.0449538967. The cubic root of 19009992 is about 266.8869332875.

The spelling of 19009992 in words is "nineteen million, nine thousand, nine hundred ninety-two".