20312460145040 has 120 divisors (see below), whose sum is σ = 56709072744192. Its totient is φ = 6739618072320.

The previous prime is 20312460144979. The next prime is 20312460145049. The reversal of 20312460145040 is 4054106421302.

It is a junction number, because it is equal to n+sod(n) for n = 20312460144988 and 20312460145006.

It is not an unprimeable number, because it can be changed into a prime (20312460145049) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83455094 + ... + 83698133.

Almost surely, 2^{20312460145040} is an apocalyptic number.

20312460145040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20312460145040 is an abundant number, since it is smaller than the sum of its proper divisors (36396612599152).

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

20312460145040 is a wasteful number, since it uses less digits than its factorization.

20312460145040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167153285 (or 167153272 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 20312460145040 its reverse (4054106421302), we get a palindrome (24366566566342).

The spelling of 20312460145040 in words is "twenty trillion, three hundred twelve billion, four hundred sixty million, one hundred forty-five thousand, forty".