20355299584 has 81 divisors (see below), whose sum is σ = 41932895571. Its totient is φ = 9861488640.

The previous prime is 20355299581. The next prime is 20355299593. The reversal of 20355299584 is 48599255302.

The square root of 20355299584 is 142672.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 8836000000 + 11519299584 = 94000^2 + 107328^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20355299581) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 84461704 + ... + 84461944.

Almost surely, 2^20355299584 is an apocalyptic number.

20355299584 is the 142672-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20355299584

20355299584 is an abundant number, since it is smaller than the sum of its proper divisors (21577595987).

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

20355299584 is an frugal number, since it uses more digits than its factorization.

20355299584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 52.

The spelling of 20355299584 in words is "twenty billion, three hundred fifty-five million, two hundred ninety-nine thousand, five hundred eighty-four".