20552102777 has 2 divisors, whose sum is σ = 20552102778. Its totient is φ = 20552102776.

The previous prime is 20552102611. The next prime is 20552102807. The reversal of 20552102777 is 77720125502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13364284816 + 7187817961 = 115604^2 + 84781^2 .

It is a cyclic number.

It is not a de Polignac number, because 20552102777 - 2¹⁰ = 20552101753 is a prime.

It is a super-2 number, since 2×20552102777² (a number of 21 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 20552102777.

It is not a weakly prime, because it can be changed into another prime (20552104777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10276051388 + 10276051389.

It is an arithmetic number, because the mean of its divisors is an integer number (10276051389).

Almost surely, 2^20552102777 is an apocalyptic number.

It is an amenable number.

20552102777 is a deficient number, since it is larger than the sum of its proper divisors (1).

20552102777 is an equidigital number, since it uses as much as digits as its factorization.

20552102777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68600, while the sum is 38.

The spelling of 20552102777 in words is "twenty billion, five hundred fifty-two million, one hundred two thousand, seven hundred seventy-seven".