20018368518502 has 8 divisors (see below), whose sum is σ = 30073118110200. Its totient is φ = 9993995815104.

The previous prime is 20018368518461. The next prime is 20018368518503. The reversal of 20018368518502 is 20581586381002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20018368518503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7594220427 + ... + 7594223062.

It is an arithmetic number, because the mean of its divisors is an integer number (3759139763775).

Almost surely, 2^{20018368518502} is an apocalyptic number.

20018368518502 is a deficient number, since it is larger than the sum of its proper divisors (10054749591698).

20018368518502 is a wasteful number, since it uses less digits than its factorization.

20018368518502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15188444150.

The product of its (nonzero) digits is 921600, while the sum is 49.

The spelling of 20018368518502 in words is "twenty trillion, eighteen billion, three hundred sixty-eight million, five hundred eighteen thousand, five hundred two".