20601055757 has 4 divisors (see below), whose sum is σ = 21311437020. Its totient is φ = 19890674496.

The previous prime is 20601055751. The next prime is 20601055799. The reversal of 20601055757 is 75755010602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10288856356 + 10312199401 = 101434^2 + 101549^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20601055757 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 20601055757.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20601055751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355190588 + ... + 355190645.

It is an arithmetic number, because the mean of its divisors is an integer number (5327859255).

Almost surely, 2^20601055757 is an apocalyptic number.

It is an amenable number.

20601055757 is a deficient number, since it is larger than the sum of its proper divisors (710381263).

20601055757 is an equidigital number, since it uses as much as digits as its factorization.

20601055757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710381262.

The product of its (nonzero) digits is 73500, while the sum is 38.

The spelling of 20601055757 in words is "twenty billion, six hundred one million, fifty-five thousand, seven hundred fifty-seven".