19117992 has 16 divisors (see below), whose sum is σ = 47795040. Its totient is φ = 6372656.

The previous prime is 19117963. The next prime is 19117997. The reversal of 19117992 is 29971191.

It is a super-2 number, since 2×19117992² = 730995236224128, 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 19117992.

It is not an unprimeable number, because it can be changed into a prime (19117997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398268 + ... + 398315.

It is an arithmetic number, because the mean of its divisors is an integer number (2987190).

Almost surely, 2^19117992 is an apocalyptic number.

19117992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19117992 is an abundant number, since it is smaller than the sum of its proper divisors (28677048).

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

19117992 is a wasteful number, since it uses less digits than its factorization.

19117992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796592 (or 796588 counting only the distinct ones).

The product of its digits is 10206, while the sum is 39.

The square root of 19117992 is about 4372.4126063307. The cubic root of 19117992 is about 267.3913938827.

It can be divided in two parts, 191179 and 92, that added together give a triangular number (191271 = T₆₁₈).

The spelling of 19117992 in words is "nineteen million, one hundred seventeen thousand, nine hundred ninety-two".