20045492 has 12 divisors (see below), whose sum is σ = 35111076. Its totient is φ = 10013760.

The previous prime is 20045477. The next prime is 20045497. The reversal of 20045492 is 29454002.

It can be written as a sum of positive squares in 2 ways, for example, as 5635876 + 14409616 = 2374^2 + 3796^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20045497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6992 + ... + 9432.

It is an arithmetic number, because the mean of its divisors is an integer number (2925923).

Almost surely, 2^20045492 is an apocalyptic number.

It is an amenable number.

20045492 is a deficient number, since it is larger than the sum of its proper divisors (15065584).

20045492 is a wasteful number, since it uses less digits than its factorization.

20045492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4498 (or 4496 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 20045492 is about 4477.2192262609. The cubic root of 20045492 is about 271.6474129571.

Adding to 20045492 its reverse (29454002), we get a palindrome (49499494).

The spelling of 20045492 in words is "twenty million, forty-five thousand, four hundred ninety-two".