20018672016 has 160 divisors (see below), whose sum is σ = 60585169920. Its totient is φ = 5576643072.

The previous prime is 20018671927. The next prime is 20018672027. The reversal of 20018672016 is 61027681002.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12410026 + ... + 12411638.

It is an arithmetic number, because the mean of its divisors is an integer number (378657312).

Almost surely, 2^20018672016 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 20018672016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30292584960).

20018672016 is an abundant number, since it is smaller than the sum of its proper divisors (40566497904).

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

20018672016 is a wasteful number, since it uses less digits than its factorization.

20018672016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2533 (or 2527 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The spelling of 20018672016 in words is "twenty billion, eighteen million, six hundred seventy-two thousand, sixteen".