20003506775765 has 16 divisors (see below), whose sum is σ = 24659335851696. Its totient is φ = 15568265011200.

The previous prime is 20003506775753. The next prime is 20003506775797. The reversal of 20003506775765 is 56757760530002.

It can be written as a sum of positive squares in 8 ways, for example, as 9792305698756 + 10211201077009 = 3129266^2 + 3195497^2 .

It is not a de Polignac number, because 20003506775765 - 2¹⁴ = 20003506759381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138140216 + ... + 138284945.

It is an arithmetic number, because the mean of its divisors is an integer number (1541208490731).

Almost surely, 2^{20003506775765} is an apocalyptic number.

It is an amenable number.

20003506775765 is a deficient number, since it is larger than the sum of its proper divisors (4655829075931).

20003506775765 is a wasteful number, since it uses less digits than its factorization.

20003506775765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276425560.

The product of its (nonzero) digits is 9261000, while the sum is 53.

The spelling of 20003506775765 in words is "twenty trillion, three billion, five hundred six million, seven hundred seventy-five thousand, seven hundred sixty-five".