20045560040 has 64 divisors (see below), whose sum is σ = 49533120000. Its totient is φ = 7240349440.

The previous prime is 20045560027. The next prime is 20045560043. The reversal of 20045560040 is 4006554002.

It is a junction number, because it is equal to n+sod(n) for n = 20045559991 and 20045560009.

It is not an unprimeable number, because it can be changed into a prime (20045560043) 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, 87320 + ... + 218439.

It is an arithmetic number, because the mean of its divisors is an integer number (773955000).

Almost surely, 2^20045560040 is an apocalyptic number.

20045560040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20045560040 is an abundant number, since it is smaller than the sum of its proper divisors (29487559960).

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

20045560040 is a wasteful number, since it uses less digits than its factorization.

20045560040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305930 (or 305926 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

It can be divided in two parts, 20045 and 560040, that added together give a palindrome (580085).

The spelling of 20045560040 in words is "twenty billion, forty-five million, five hundred sixty thousand, forty".