20169518408 has 32 divisors (see below), whose sum is σ = 40906373760. Its totient is φ = 9267988800.

The previous prime is 20169518387. The next prime is 20169518491. The reversal of 20169518408 is 80481596102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 403568 + ... + 450783.

It is an arithmetic number, because the mean of its divisors is an integer number (1278324180).

Almost surely, 2^20169518408 is an apocalyptic number.

It is an amenable number.

20169518408 is an abundant number, since it is smaller than the sum of its proper divisors (20736855352).

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

20169518408 is a wasteful number, since it uses less digits than its factorization.

20169518408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854597 (or 854593 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 44.

The spelling of 20169518408 in words is "twenty billion, one hundred sixty-nine million, five hundred eighteen thousand, four hundred eight".