20161327441720 has 64 divisors (see below), whose sum is σ = 46474071304320. Its totient is φ = 7867458420864.

The previous prime is 20161327441687. The next prime is 20161327441771. The reversal of 20161327441720 is 2714472316102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5664442 + ... + 8509321.

It is an arithmetic number, because the mean of its divisors is an integer number (726157364130).

Almost surely, 2^{20161327441720} is an apocalyptic number.

20161327441720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20161327441720 is an abundant number, since it is smaller than the sum of its proper divisors (26312743862600).

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

20161327441720 is a wasteful number, since it uses less digits than its factorization.

20161327441720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14174644 (or 14174640 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 40.

Adding to 20161327441720 its reverse (2714472316102), we get a palindrome (22875799757822).

The spelling of 20161327441720 in words is "twenty trillion, one hundred sixty-one billion, three hundred twenty-seven million, four hundred forty-one thousand, seven hundred twenty".