20315536040 has 16 divisors (see below), whose sum is σ = 45709956180. Its totient is φ = 8126214400.

The previous prime is 20315535997. The next prime is 20315536049. The reversal of 20315536040 is 4063551302.

It can be written as a sum of positive squares in 2 ways, for example, as 16443958756 + 3871577284 = 128234^2 + 62222^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20315535994 and 20315536012.

It is not an unprimeable number, because it can be changed into a prime (20315536049) 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 3 ways as a sum of consecutive naturals, for example, 253944161 + ... + 253944240.

Almost surely, 2^20315536040 is an apocalyptic number.

20315536040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20315536040 is an abundant number, since it is smaller than the sum of its proper divisors (25394420140).

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

20315536040 is a wasteful number, since it uses less digits than its factorization.

20315536040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507888412 (or 507888408 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The spelling of 20315536040 in words is "twenty billion, three hundred fifteen million, five hundred thirty-six thousand, forty".