20045450 has 24 divisors (see below), whose sum is σ = 37497600. Its totient is φ = 7972400.

The previous prime is 20045449. The next prime is 20045461. The reversal of 20045450 is 5454002.

It is a happy number.

It is a Curzon number.

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 11 ways as a sum of consecutive naturals, for example, 8501 + ... + 10599.

It is an arithmetic number, because the mean of its divisors is an integer number (1562400).

Almost surely, 2^20045450 is an apocalyptic number.

20045450 is a deficient number, since it is larger than the sum of its proper divisors (17452150).

20045450 is a wasteful number, since it uses less digits than its factorization.

20045450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2302 (or 2297 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 20045450 is about 4477.2145358470. The cubic root of 20045450 is about 271.6472232353.

Adding to 20045450 its reverse (5454002), we get a palindrome (25499452).

The spelling of 20045450 in words is "twenty million, forty-five thousand, four hundred fifty".