20003561253716 has 12 divisors (see below), whose sum is σ = 37065422323188. Its totient is φ = 9413440589952.

The previous prime is 20003561253659. The next prime is 20003561253727. The reversal of 20003561253716 is 61735216530002.

It can be written as a sum of positive squares in 2 ways, for example, as 17796417216400 + 2207144037316 = 4218580^2 + 1485646^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147085009151 + ... + 147085009286.

It is an arithmetic number, because the mean of its divisors is an integer number (3088785193599).

Almost surely, 2^{20003561253716} is an apocalyptic number.

It is an amenable number.

20003561253716 is a deficient number, since it is larger than the sum of its proper divisors (17061861069472).

20003561253716 is a wasteful number, since it uses less digits than its factorization.

20003561253716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294170018458 (or 294170018456 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 41.

Adding to 20003561253716 its reverse (61735216530002), we get a palindrome (81738777783718).

The spelling of 20003561253716 in words is "twenty trillion, three billion, five hundred sixty-one million, two hundred fifty-three thousand, seven hundred sixteen".