20040192 has 60 divisors (see below), whose sum is σ = 57850650. Its totient is φ = 6678528.

The previous prime is 20040191. The next prime is 20040197. The reversal of 20040192 is 29104002.

It can be written as a sum of positive squares in only one way, i.e., 19927296 + 112896 = 4464^2 + 336^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20040191) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2434 + ... + 6782.

Almost surely, 2^20040192 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 20040192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28925325).

20040192 is an abundant number, since it is smaller than the sum of its proper divisors (37810458).

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

20040192 is an equidigital number, since it uses as much as digits as its factorization.

20040192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4373 (or 4354 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 20040192 is about 4476.6273018870. The cubic root of 20040192 is about 271.6234697817.

Adding to 20040192 its reverse (29104002), we get a palindrome (49144194).

The spelling of 20040192 in words is "twenty million, forty thousand, one hundred ninety-two".