20165645045364 has 288 divisors, whose sum is σ = 59175699448320. Its totient is φ = 5297699780352.

The previous prime is 20165645045353. The next prime is 20165645045407. The reversal of 20165645045364 is 46354054656102.

It is a super-2 number, since 2×20165645045364² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2558114167 + ... + 2558122049.

It is an arithmetic number, because the mean of its divisors is an integer number (205471178640).

Almost surely, 2^{20165645045364} 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 20165645045364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29587849724160).

20165645045364 is an abundant number, since it is smaller than the sum of its proper divisors (39010054402956).

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

20165645045364 is a wasteful number, since it uses less digits than its factorization.

20165645045364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9179 (or 9170 counting only the distinct ones).

The product of its (nonzero) digits is 10368000, while the sum is 51.

The spelling of 20165645045364 in words is "twenty trillion, one hundred sixty-five billion, six hundred forty-five million, forty-five thousand, three hundred sixty-four".