20356465312 has 24 divisors (see below), whose sum is σ = 42434250516. Its totient is φ = 9579512832.

The previous prime is 20356465277. The next prime is 20356465319. The reversal of 20356465312 is 21356465302.

It can be written as a sum of positive squares in 2 ways, for example, as 20356440976 + 24336 = 142676^2 + 156^2 .

It is not an unprimeable number, because it can be changed into a prime (20356465319) 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, 18709443 + ... + 18710530.

Almost surely, 2^20356465312 is an apocalyptic number.

It is an amenable number.

20356465312 is an abundant number, since it is smaller than the sum of its proper divisors (22077785204).

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

20356465312 is a wasteful number, since it uses less digits than its factorization.

20356465312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37420000 (or 37419992 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 37.

The spelling of 20356465312 in words is "twenty billion, three hundred fifty-six million, four hundred sixty-five thousand, three hundred twelve".