4020454505 has 4 divisors (see below), whose sum is σ = 4824545412. Its totient is φ = 3216363600.

The previous prime is 4020454453. The next prime is 4020454531. The reversal of 4020454505 is 5054540204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2216243929 + 1804210576 = 47077^2 + 42476^2 .

It is a de Polignac number, because none of the positive numbers 2^k-4020454505 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402045446 + ... + 402045455.

It is an arithmetic number, because the mean of its divisors is an integer number (1206136353).

Almost surely, 2^4020454505 is an apocalyptic number.

It is an amenable number.

4020454505 is a deficient number, since it is larger than the sum of its proper divisors (804090907).

4020454505 is an equidigital number, since it uses as much as digits as its factorization.

4020454505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804090906.

The product of its (nonzero) digits is 16000, while the sum is 29.

The square root of 4020454505 is about 63407.0540634084. The cubic root of 4020454505 is about 1590.1022447864.

Adding to 4020454505 its reverse (5054540204), we get a palindrome (9074994709).

The spelling of 4020454505 in words is "four billion, twenty million, four hundred fifty-four thousand, five hundred five".