20003565367061 has 16 divisors (see below), whose sum is σ = 20502349460208. Its totient is φ = 19505303001600.

The previous prime is 20003565366997. The next prime is 20003565367063. The reversal of 20003565367061 is 16076356530002.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2105165944561 + 17898399422500 = 1450919^2 + 4230650^2 .

It is not a de Polignac number, because 20003565367061 - 2⁶ = 20003565366997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20003565367063) 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, 666481691 + ... + 666511703.

It is an arithmetic number, because the mean of its divisors is an integer number (1281396841263).

Almost surely, 2^{20003565367061} is an apocalyptic number.

It is an amenable number.

20003565367061 is a deficient number, since it is larger than the sum of its proper divisors (498784093147).

20003565367061 is a wasteful number, since it uses less digits than its factorization.

20003565367061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38152.

The product of its (nonzero) digits is 680400, while the sum is 44.

The spelling of 20003565367061 in words is "twenty trillion, three billion, five hundred sixty-five million, three hundred sixty-seven thousand, sixty-one".