20615316040 has 64 divisors (see below), whose sum is σ = 51102342720. Its totient is φ = 7422240000.

The previous prime is 20615316023. The next prime is 20615316041. The reversal of 20615316040 is 4061351602.

It is not an unprimeable number, because it can be changed into a prime (20615316041) 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 15 ways as a sum of consecutive naturals, for example, 187506 + ... + 276385.

It is an arithmetic number, because the mean of its divisors is an integer number (798474105).

Almost surely, 2^20615316040 is an apocalyptic number.

20615316040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20615316040 is an abundant number, since it is smaller than the sum of its proper divisors (30487026680).

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

20615316040 is a wasteful number, since it uses less digits than its factorization.

20615316040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464014 (or 464010 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 20615316040 its reverse (4061351602), we get a palindrome (24676667642).

The spelling of 20615316040 in words is "twenty billion, six hundred fifteen million, three hundred sixteen thousand, forty".