20045451113 has 16 divisors (see below), whose sum is σ = 20899531536. Its totient is φ = 19209830400.

The previous prime is 20045451067. The next prime is 20045451143. The reversal of 20045451113 is 31115454002.

It can be written as a sum of positive squares in 8 ways, for example, as 107163904 + 19938287209 = 10352^2 + 141203^2 .

It is not a de Polignac number, because 20045451113 - 2²⁰ = 20044402537 is a prime.

It is a super-2 number, since 2×20045451113² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20045451143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 707345 + ... + 735137.

It is an arithmetic number, because the mean of its divisors is an integer number (1306220721).

Almost surely, 2^20045451113 is an apocalyptic number.

It is an amenable number.

20045451113 is a deficient number, since it is larger than the sum of its proper divisors (854080423).

20045451113 is a wasteful number, since it uses less digits than its factorization.

20045451113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28124.

The product of its (nonzero) digits is 2400, while the sum is 26.

The spelling of 20045451113 in words is "twenty billion, forty-five million, four hundred fifty-one thousand, one hundred thirteen".