20168595361 has 4 divisors (see below), whose sum is σ = 21230100400. Its totient is φ = 19107090324.

The previous prime is 20168595347. The next prime is 20168595383. The reversal of 20168595361 is 16359586102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20168595361 - 2²⁵ = 20135040929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20168595301) 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, 530752491 + ... + 530752528.

It is an arithmetic number, because the mean of its divisors is an integer number (5307525100).

Almost surely, 2^20168595361 is an apocalyptic number.

It is an amenable number.

20168595361 is a deficient number, since it is larger than the sum of its proper divisors (1061505039).

20168595361 is a wasteful number, since it uses less digits than its factorization.

20168595361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061505038.

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 20168595361 in words is "twenty billion, one hundred sixty-eight million, five hundred ninety-five thousand, three hundred sixty-one".