20166348138 has 16 divisors (see below), whose sum is σ = 40359728736. Its totient is φ = 6717610640.

The previous prime is 20166348121. The next prime is 20166348187. The reversal of 20166348138 is 83184366102.

It is a self number, because there is not a number n which added to its sum of digits gives 20166348138.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1116648 + ... + 1134563.

It is an arithmetic number, because the mean of its divisors is an integer number (2522483046).

Almost surely, 2^20166348138 is an apocalyptic number.

20166348138 is an abundant number, since it is smaller than the sum of its proper divisors (20193380598).

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

20166348138 is a wasteful number, since it uses less digits than its factorization.

20166348138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2252709.

The product of its (nonzero) digits is 165888, while the sum is 42.

The spelling of 20166348138 in words is "twenty billion, one hundred sixty-six million, three hundred forty-eight thousand, one hundred thirty-eight".