20003561000005 has 32 divisors (see below), whose sum is σ = 26239909824000. Its totient is φ = 14518387353600.

The previous prime is 20003560999999. The next prime is 20003561000081. The reversal of 20003561000005 is 50000016530002.

It is a happy number.

It is not a de Polignac number, because 20003561000005 - 2¹¹ = 20003560997957 is a prime.

It is a super-2 number, since 2×20003561000005² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20003561000005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61091925 + ... + 61418485.

It is an arithmetic number, because the mean of its divisors is an integer number (819997182000).

Almost surely, 2^{20003561000005} is an apocalyptic number.

It is an amenable number.

20003561000005 is a deficient number, since it is larger than the sum of its proper divisors (6236348823995).

20003561000005 is a wasteful number, since it uses less digits than its factorization.

20003561000005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328845.

The product of its (nonzero) digits is 900, while the sum is 22.

Adding to 20003561000005 its reverse (50000016530002), we get a palindrome (70003577530007).

The spelling of 20003561000005 in words is "twenty trillion, three billion, five hundred sixty-one million, five", and thus it is an aban number.