20116665000 has 240 divisors, whose sum is σ = 68310399300. Its totient is φ = 5346432000.

The previous prime is 20116664993. The next prime is 20116665059. The reversal of 20116665000 is 56661102.

It is a happy number.

It can be written as a sum of positive squares in 10 ways, for example, as 1669049316 + 18447615684 = 40854^2 + 135822^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 18404454 + ... + 18405546.

Almost surely, 2^20116665000 is an apocalyptic number.

20116665000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20116665000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34155199650).

20116665000 is an abundant number, since it is smaller than the sum of its proper divisors (48193734300).

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

20116665000 is a wasteful number, since it uses less digits than its factorization.

20116665000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534 (or 1512 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The spelling of 20116665000 in words is "twenty billion, one hundred sixteen million, six hundred sixty-five thousand".