20563380318 has 32 divisors (see below), whose sum is σ = 44466855552. Its totient is φ = 6301980000.

The previous prime is 20563380311. The next prime is 20563380337. The reversal of 20563380318 is 81308336502.

It is a super-2 number, since 2×20563380318² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20563380311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 505588 + ... + 544743.

It is an arithmetic number, because the mean of its divisors is an integer number (1389589236).

Almost surely, 2^20563380318 is an apocalyptic number.

20563380318 is an abundant number, since it is smaller than the sum of its proper divisors (23903475234).

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

20563380318 is a wasteful number, since it uses less digits than its factorization.

20563380318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050600.

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 20563380318 in words is "twenty billion, five hundred sixty-three million, three hundred eighty thousand, three hundred eighteen".