19081712 has 40 divisors (see below), whose sum is σ = 40101600. Its totient is φ = 8743680.

The previous prime is 19081693. The next prime is 19081729. The reversal of 19081712 is 21718091.

It is a super-2 number, since 2×19081712² = 728223465701888, which contains 22 as substring.

It is a congruent number.

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, 41162 + ... + 41622.

It is an arithmetic number, because the mean of its divisors is an integer number (1002540).

Almost surely, 2^19081712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19081712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20050800).

19081712 is an abundant number, since it is smaller than the sum of its proper divisors (21019888).

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

19081712 is a wasteful number, since it uses less digits than its factorization.

19081712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681 (or 675 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 19081712 is about 4368.2618969105. The cubic root of 19081712 is about 267.2221448891. Note that the first 3 decimals are identical.

The spelling of 19081712 in words is "nineteen million, eighty-one thousand, seven hundred twelve".