19689192 has 48 divisors (see below), whose sum is σ = 53707680. Its totient is φ = 6516000.

The previous prime is 19689167. The next prime is 19689209. The reversal of 19689192 is 29198691.

It is a super-2 number, since 2×19689192² = 775328563225728, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 9967 + ... + 11777.

It is an arithmetic number, because the mean of its divisors is an integer number (1118910).

Almost surely, 2^19689192 is an apocalyptic number.

19689192 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19689192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26853840).

19689192 is an abundant number, since it is smaller than the sum of its proper divisors (34018488).

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

19689192 is a wasteful number, since it uses less digits than its factorization.

With its successor (19689193) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (1967).

19689192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1974 (or 1967 counting only the distinct ones).

The product of its digits is 69984, while the sum is 45.

The square root of 19689192 is about 4437.2505000281. The cubic root of 19689192 is about 270.0283097888.

It can be divided in two parts, 19689 and 192, that added together give a square (19881 = 141²).

The spelling of 19689192 in words is "nineteen million, six hundred eighty-nine thousand, one hundred ninety-two".