20310315440 has 40 divisors (see below), whose sum is σ = 47232685248. Its totient is φ = 8122199040.

The previous prime is 20310315433. The next prime is 20310315469. The reversal of 20310315440 is 4451301302.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337049 + ... + 392711.

Almost surely, 2^20310315440 is an apocalyptic number.

20310315440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20310315440 is an abundant number, since it is smaller than the sum of its proper divisors (26922369808).

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

20310315440 is a wasteful number, since it uses less digits than its factorization.

20310315440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60237 (or 60231 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 20310315440 its reverse (4451301302), we get a palindrome (24761616742).

The spelling of 20310315440 in words is "twenty billion, three hundred ten million, three hundred fifteen thousand, four hundred forty".