20507366377 has 2 divisors, whose sum is σ = 20507366378. Its totient is φ = 20507366376.

The previous prime is 20507366353. The next prime is 20507366423. The reversal of 20507366377 is 77366370502.

It is an a-pointer prime, because the next prime (20507366423) can be obtained adding 20507366377 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11242148841 + 9265217536 = 106029^2 + 96256^2 .

It is a cyclic number.

It is not a de Polignac number, because 20507366377 - 2⁷ = 20507366249 is a prime.

It is a super-2 number, since 2×20507366377² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20507366317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10253683188 + 10253683189.

It is an arithmetic number, because the mean of its divisors is an integer number (10253683189).

Almost surely, 2^20507366377 is an apocalyptic number.

It is an amenable number.

20507366377 is a deficient number, since it is larger than the sum of its proper divisors (1).

20507366377 is an equidigital number, since it uses as much as digits as its factorization.

20507366377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1111320, while the sum is 46.

It can be divided in two parts, 20507 and 366377, that added together give a square (386884 = 622²).

The spelling of 20507366377 in words is "twenty billion, five hundred seven million, three hundred sixty-six thousand, three hundred seventy-seven".