4200020505 has 56 divisors (see below), whose sum is σ = 7573466952. Its totient is φ = 2235009024.

The previous prime is 4200020483. The next prime is 4200020507. The reversal of 4200020505 is 5050200024.

It can be written as a sum of positive squares in 4 ways, for example, as 519292944 + 3680727561 = 22788^2 + 60669^2 .

It is not a de Polignac number, because 4200020505 - 2¹⁸ = 4199758361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4200020507) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 2102167 + ... + 2104163.

Almost surely, 2^4200020505 is an apocalyptic number.

4200020505 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4200020505 is a deficient number, since it is larger than the sum of its proper divisors (3373446447).

4200020505 is an equidigital number, since it uses as much as digits as its factorization.

4200020505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2597 (or 2582 counting only the distinct ones).

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

The square root of 4200020505 is about 64807.5651833951. The cubic root of 4200020505 is about 1613.4312716833.

Adding to 4200020505 its reverse (5050200024), we get a palindrome (9250220529).

The spelling of 4200020505 in words is "four billion, two hundred million, twenty thousand, five hundred five".