2455804021 has 6 divisors (see below), whose sum is σ = 2699354966. Its totient is φ = 2232549000.

The previous prime is 2455804009. The next prime is 2455804031. The reversal of 2455804021 is 1204085542.

It can be written as a sum of positive squares in only one way, i.e., 1715202225 + 740601796 = 41415^2 + 27214^2 .

It is not a de Polignac number, because 2455804021 - 2⁷ = 2455803893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2455804031) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 10147830 + ... + 10148071.

Almost surely, 2^2455804021 is an apocalyptic number.

It is an amenable number.

2455804021 is a deficient number, since it is larger than the sum of its proper divisors (243550945).

2455804021 is a wasteful number, since it uses less digits than its factorization.

2455804021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20295923 (or 20295912 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 31.

The square root of 2455804021 is about 49556.0694668171. The cubic root of 2455804021 is about 1349.1634544785.

Adding to 2455804021 its reverse (1204085542), we get a palindrome (3659889563).

The spelling of 2455804021 in words is "two billion, four hundred fifty-five million, eight hundred four thousand, twenty-one".