19912068 has 120 divisors (see below), whose sum is σ = 58707264. Its totient is φ = 5832000.

The previous prime is 19912033. The next prime is 19912091. The reversal of 19912068 is 86021991.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 39 ways as a sum of consecutive naturals, for example, 131793 + ... + 131943.

Almost surely, 2^19912068 is an apocalyptic number.

19912068 is a gapful number since it is divisible by the number (18) 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 19912068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29353632).

19912068 is an abundant number, since it is smaller than the sum of its proper divisors (38795196).

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

19912068 is a wasteful number, since it uses less digits than its factorization.

19912068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 19912068 is about 4462.2940288600. The cubic root of 19912068 is about 271.0433702822.

The spelling of 19912068 in words is "nineteen million, nine hundred twelve thousand, sixty-eight".