20508120595218 has 32 divisors (see below), whose sum is σ = 42323328169920. Its totient is φ = 6620626423040.

The previous prime is 20508120595217. The next prime is 20508120595231. The reversal of 20508120595218 is 81259502180502.

It is not an unprimeable number, because it can be changed into a prime (20508120595217) 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, 304223028 + ... + 304290431.

It is an arithmetic number, because the mean of its divisors is an integer number (1322604005310).

Almost surely, 2^{20508120595218} is an apocalyptic number.

20508120595218 is an abundant number, since it is smaller than the sum of its proper divisors (21815207574702).

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

20508120595218 is a wasteful number, since it uses less digits than its factorization.

20508120595218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608513642.

The product of its (nonzero) digits is 576000, while the sum is 48.

The spelling of 20508120595218 in words is "twenty trillion, five hundred eight billion, one hundred twenty million, five hundred ninety-five thousand, two hundred eighteen".