20040455057 has 4 divisors (see below), whose sum is σ = 22903377216. Its totient is φ = 17177532900.

The previous prime is 20040455041. The next prime is 20040455089. The reversal of 20040455057 is 75055404002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20040455057 - 2⁴ = 20040455041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20045455057) 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 3 ways as a sum of consecutive naturals, for example, 1431461069 + ... + 1431461082.

It is an arithmetic number, because the mean of its divisors is an integer number (5725844304).

Almost surely, 2^20040455057 is an apocalyptic number.

It is an amenable number.

20040455057 is a deficient number, since it is larger than the sum of its proper divisors (2862922159).

20040455057 is an equidigital number, since it uses as much as digits as its factorization.

20040455057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2862922158.

The product of its (nonzero) digits is 28000, while the sum is 32.

Adding to 20040455057 its reverse (75055404002), we get a palindrome (95095859059).

The spelling of 20040455057 in words is "twenty billion, forty million, four hundred fifty-five thousand, fifty-seven".