20766055745 has 8 divisors (see below), whose sum is σ = 25072146816. Its totient is φ = 16510924656.

The previous prime is 20766055721. The next prime is 20766055771. The reversal of 20766055745 is 54755066702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20766055745 - 2¹⁰ = 20766054721 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20766055745.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12739097 + ... + 12740726.

It is an arithmetic number, because the mean of its divisors is an integer number (3134018352).

Almost surely, 2^20766055745 is an apocalyptic number.

It is an amenable number.

20766055745 is a deficient number, since it is larger than the sum of its proper divisors (4306091071).

20766055745 is a wasteful number, since it uses less digits than its factorization.

20766055745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25479991.

The product of its (nonzero) digits is 1764000, while the sum is 47.

The spelling of 20766055745 in words is "twenty billion, seven hundred sixty-six million, fifty-five thousand, seven hundred forty-five".