20045512 has 16 divisors (see below), whose sum is σ = 39219840. Its totient is φ = 9586896.

The previous prime is 20045507. The next prime is 20045521. The reversal of 20045512 is 21554002.

It is a self number, because there is not a number n which added to its sum of digits gives 20045512.

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 3 ways as a sum of consecutive naturals, for example, 54288 + ... + 54655.

It is an arithmetic number, because the mean of its divisors is an integer number (2451240).

Almost surely, 2^20045512 is an apocalyptic number.

It is an amenable number.

20045512 is a deficient number, since it is larger than the sum of its proper divisors (19174328).

20045512 is a wasteful number, since it uses less digits than its factorization.

20045512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108972 (or 108968 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 20045512 is about 4477.2214597895. The cubic root of 20045512 is about 271.6475033007.

Adding to 20045512 its reverse (21554002), we get a palindrome (41599514).

The spelling of 20045512 in words is "twenty million, forty-five thousand, five hundred twelve".