20009192 has 32 divisors (see below), whose sum is σ = 43305600. Its totient is φ = 8489664.

The previous prime is 20009183. The next prime is 20009243. The reversal of 20009192 is 29190002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4034 + ... + 7502.

It is an arithmetic number, because the mean of its divisors is an integer number (1353300).

Almost surely, 2^20009192 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 20009192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21652800).

20009192 is an abundant number, since it is smaller than the sum of its proper divisors (23296408).

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

20009192 is a wasteful number, since it uses less digits than its factorization.

20009192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3585 (or 3581 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 20009192 is about 4473.1635337868. The cubic root of 20009192 is about 271.4833401682.

Adding to 20009192 its reverse (29190002), we get a palindrome (49199194).

The spelling of 20009192 in words is "twenty million, nine thousand, one hundred ninety-two".