20346753568 has 48 divisors (see below), whose sum is σ = 41589094680. Its totient is φ = 9786986496.

The previous prime is 20346753533. The next prime is 20346753571. The reversal of 20346753568 is 86535764302.

It can be written as a sum of positive squares in 4 ways, for example, as 17105500944 + 3241252624 = 130788^2 + 56932^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217480 + ... + 296632.

Almost surely, 2^20346753568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20346753568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20794547340).

20346753568 is an abundant number, since it is smaller than the sum of its proper divisors (21242341112).

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

20346753568 is a wasteful number, since it uses less digits than its factorization.

20346753568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79469 (or 79461 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 49.

The spelling of 20346753568 in words is "twenty billion, three hundred forty-six million, seven hundred fifty-three thousand, five hundred sixty-eight".