20165597498816 has 224 divisors, whose sum is σ = 50365705029120. Its totient is φ = 7782184857600.

The previous prime is 20165597498791. The next prime is 20165597498873. The reversal of 20165597498816 is 61889479556102.

20165597498816 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (224).

It is a self number, because there is not a number n which added to its sum of digits gives 20165597498816.

It is a congruent number.

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, 229290371 + ... + 229378301.

Almost surely, 2^{20165597498816} 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 20165597498816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25182852514560).

20165597498816 is an abundant number, since it is smaller than the sum of its proper divisors (30200107530304).

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

20165597498816 is a wasteful number, since it uses less digits than its factorization.

20165597498816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88403 (or 88393 counting only the distinct ones).

The product of its (nonzero) digits is 261273600, while the sum is 71.

The spelling of 20165597498816 in words is "twenty trillion, one hundred sixty-five billion, five hundred ninety-seven million, four hundred ninety-eight thousand, eight hundred sixteen".