20320016165 has 8 divisors (see below), whose sum is σ = 25667388960. Its totient is φ = 15400433232.

The previous prime is 20320016161. The next prime is 20320016201. The reversal of 20320016165 is 56161002302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20320016165 - 2² = 20320016161 is a prime.

It is a super-2 number, since 2×20320016165² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320016161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106947359 + ... + 106947548.

It is an arithmetic number, because the mean of its divisors is an integer number (3208423620).

Almost surely, 2^20320016165 is an apocalyptic number.

It is an amenable number.

20320016165 is a deficient number, since it is larger than the sum of its proper divisors (5347372795).

20320016165 is a wasteful number, since it uses less digits than its factorization.

20320016165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213894931.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 20320016165 its reverse (56161002302), we get a palindrome (76481018467).

The spelling of 20320016165 in words is "twenty billion, three hundred twenty million, sixteen thousand, one hundred sixty-five".