20356465161 has 8 divisors (see below), whose sum is σ = 27143131840. Its totient is φ = 13570387632.

The previous prime is 20356465153. The next prime is 20356465163. The reversal of 20356465161 is 16156465302.

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

It is not a de Polignac number, because 20356465161 - 2³ = 20356465153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20356465163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59125 + ... + 210258.

It is an arithmetic number, because the mean of its divisors is an integer number (3392891480).

Almost surely, 2^20356465161 is an apocalyptic number.

It is an amenable number.

20356465161 is a deficient number, since it is larger than the sum of its proper divisors (6786666679).

20356465161 is a wasteful number, since it uses less digits than its factorization.

20356465161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294575.

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 20356465161 in words is "twenty billion, three hundred fifty-six million, four hundred sixty-five thousand, one hundred sixty-one".