13012002540 has 96 divisors (see below), whose sum is σ = 40499766720. Its totient is φ = 3468326400.

The previous prime is 13012002539. The next prime is 13012002557. The reversal of 13012002540 is 4520021031.

13012002540 is a `hidden beast` number, since 1 + 3 + 0 + 120 + 0 + 2 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1735600 + ... + 1743080.

It is an arithmetic number, because the mean of its divisors is an integer number (421872570).

Almost surely, 2^13012002540 is an apocalyptic number.

13012002540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13012002540 is an abundant number, since it is smaller than the sum of its proper divisors (27487764180).

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

13012002540 is a wasteful number, since it uses less digits than its factorization.

13012002540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10720 (or 10712 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

Adding to 13012002540 its reverse (4520021031), we get a palindrome (17532023571).

The spelling of 13012002540 in words is "thirteen billion, twelve million, two thousand, five hundred forty".