20363163578 has 4 divisors (see below), whose sum is σ = 30544745370. Its totient is φ = 10181581788.

The previous prime is 20363163577. The next prime is 20363163637. The reversal of 20363163578 is 87536136302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16085087929 + 4278075649 = 126827^2 + 65407^2 .

It is not an unprimeable number, because it can be changed into a prime (20363163577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5090790893 + ... + 5090790896.

Almost surely, 2^20363163578 is an apocalyptic number.

20363163578 is a deficient number, since it is larger than the sum of its proper divisors (10181581792).

20363163578 is a wasteful number, since it uses less digits than its factorization.

20363163578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10181581791.

The product of its (nonzero) digits is 544320, while the sum is 44.

The spelling of 20363163578 in words is "twenty billion, three hundred sixty-three million, one hundred sixty-three thousand, five hundred seventy-eight".