20418165376 has 128 divisors (see below), whose sum is σ = 48142172160. Its totient is φ = 8441072640.

The previous prime is 20418165371. The next prime is 20418165431. The reversal of 20418165376 is 67356181402.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (20418165371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10192791 + ... + 10194793.

It is an arithmetic number, because the mean of its divisors is an integer number (376110720).

Almost surely, 2^20418165376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20418165376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24071086080).

20418165376 is an abundant number, since it is smaller than the sum of its proper divisors (27724006784).

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

20418165376 is a wasteful number, since it uses less digits than its factorization.

20418165376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2422 (or 2410 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 20418165376 in words is "twenty billion, four hundred eighteen million, one hundred sixty-five thousand, three hundred seventy-six".