450520020 has 72 divisors (see below), whose sum is σ = 1438513440. Its totient is φ = 113814720.

The previous prime is 450519997. The next prime is 450520027. The reversal of 450520020 is 20025054.

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

It is a junction number, because it is equal to n+sod(n) for n = 450519975 and 450520002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450520027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62446 + ... + 69285.

Almost surely, 2^450520020 is an apocalyptic number.

It is an amenable number.

450520020 is an abundant number, since it is smaller than the sum of its proper divisors (987993420).

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

450520020 is a wasteful number, since it uses less digits than its factorization.

450520020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131765 (or 131760 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 450520020 is about 21225.4568855419. The cubic root of 450520020 is about 766.6045011556.

Adding to 450520020 its reverse (20025054), we get a palindrome (470545074).

The spelling of 450520020 in words is "four hundred fifty million, five hundred twenty thousand, twenty".