20045311240 has 32 divisors (see below), whose sum is σ = 45277467480. Its totient is φ = 7986921472.

The previous prime is 20045311229. The next prime is 20045311267. The reversal of 20045311240 is 4211354002.

It can be written as a sum of positive squares in 4 ways, for example, as 17227612516 + 2817698724 = 131254^2 + 53082^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 964687 + ... + 985246.

Almost surely, 2^20045311240 is an apocalyptic number.

20045311240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20045311240 is an abundant number, since it is smaller than the sum of its proper divisors (25232156240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20045311240 is a wasteful number, since it uses less digits than its factorization.

20045311240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1950201 (or 1950197 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 20045311240 its reverse (4211354002), we get a palindrome (24256665242).

The spelling of 20045311240 in words is "twenty billion, forty-five million, three hundred eleven thousand, two hundred forty".