2138203018506 has 32 divisors (see below), whose sum is σ = 4501997121600. Its totient is φ = 675144443520.

The previous prime is 2138203018387. The next prime is 2138203018507. The reversal of 2138203018506 is 6058103028312.

It is not an unprimeable number, because it can be changed into a prime (2138203018507) 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, 76411 + ... + 2069358.

It is an arithmetic number, because the mean of its divisors is an integer number (140687410050).

Almost surely, 2^{2138203018506} is an apocalyptic number.

2138203018506 is an abundant number, since it is smaller than the sum of its proper divisors (2363794103094).

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

2138203018506 is a wasteful number, since it uses less digits than its factorization.

2138203018506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2154534.

The product of its (nonzero) digits is 69120, while the sum is 39.

The spelling of 2138203018506 in words is "two trillion, one hundred thirty-eight billion, two hundred three million, eighteen thousand, five hundred six".