19320906 has 32 divisors (see below), whose sum is σ = 42674688. Its totient is φ = 5782640.

The previous prime is 19320887. The next prime is 19320937. The reversal of 19320906 is 60902391.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3715 + ... + 7241.

It is an arithmetic number, because the mean of its divisors is an integer number (1333584).

Almost surely, 2^19320906 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19320906, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21337344).

19320906 is an abundant number, since it is smaller than the sum of its proper divisors (23353782).

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

19320906 is a wasteful number, since it uses less digits than its factorization.

19320906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3626.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 19320906 is about 4395.5552550275. Note that the first 3 decimals coincide. The cubic root of 19320906 is about 268.3340769583.

The spelling of 19320906 in words is "nineteen million, three hundred twenty thousand, nine hundred six".