20040735040 has 56 divisors (see below), whose sum is σ = 48504375432. Its totient is φ = 7884871680.

The previous prime is 20040735031. The next prime is 20040735047. The reversal of 20040735040 is 4053704002.

It can be written as a sum of positive squares in 4 ways, for example, as 1668559104 + 18372175936 = 40848^2 + 135544^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20040734996 and 20040735014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20040735047) 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 7 ways as a sum of consecutive naturals, for example, 493819 + ... + 532858.

Almost surely, 2^20040735040 is an apocalyptic number.

20040735040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20040735040 is an abundant number, since it is smaller than the sum of its proper divisors (28463640392).

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

20040735040 is a wasteful number, since it uses less digits than its factorization.

20040735040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026755 (or 1026745 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 25.

The spelling of 20040735040 in words is "twenty billion, forty million, seven hundred thirty-five thousand, forty".