18520075635240 has 64 divisors (see below), whose sum is σ = 55561751530560. Its totient is φ = 4938551313920.

The previous prime is 18520075635223. The next prime is 18520075635241. The reversal of 18520075635240 is 4253657002581.

It is a self number, because there is not a number n which added to its sum of digits gives 18520075635240.

It is not an unprimeable number, because it can be changed into a prime (18520075635241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2312167 + ... + 6510473.

It is an arithmetic number, because the mean of its divisors is an integer number (868152367665).

Almost surely, 2^{18520075635240} is an apocalyptic number.

18520075635240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18520075635240 is an abundant number, since it is smaller than the sum of its proper divisors (37041675895320).

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

18520075635240 is a wasteful number, since it uses less digits than its factorization.

18520075635240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4235082 (or 4235078 counting only the distinct ones).

The product of its (nonzero) digits is 2016000, while the sum is 48.

The spelling of 18520075635240 in words is "eighteen trillion, five hundred twenty billion, seventy-five million, six hundred thirty-five thousand, two hundred forty".