20164522097 has 4 divisors (see below), whose sum is σ = 20177150196. Its totient is φ = 20151894000.

The previous prime is 20164522057. The next prime is 20164522109. The reversal of 20164522097 is 79022546102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13924944016 + 6239578081 = 118004^2 + 78991^2 .

It is a cyclic number.

It is not a de Polignac number, because 20164522097 - 2²⁰ = 20163473521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20164522097.

It is not an unprimeable number, because it can be changed into a prime (20164522057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6311654 + ... + 6314847.

It is an arithmetic number, because the mean of its divisors is an integer number (5044287549).

Almost surely, 2^20164522097 is an apocalyptic number.

It is an amenable number.

20164522097 is a deficient number, since it is larger than the sum of its proper divisors (12628099).

20164522097 is a wasteful number, since it uses less digits than its factorization.

20164522097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12628098.

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 20164522097 in words is "twenty billion, one hundred sixty-four million, five hundred twenty-two thousand, ninety-seven".