20013770204377 has 2 divisors, whose sum is σ = 20013770204378. Its totient is φ = 20013770204376.

The previous prime is 20013770204347. The next prime is 20013770204497. The reversal of 20013770204377 is 77340207731002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10391235919936 + 9622534284441 = 3223544^2 + 3102021^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20013770204377 is a prime.

It is a super-4 number, since 4×20013770204377⁴ (a number of 54 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (20013770204327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006885102188 + 10006885102189.

It is an arithmetic number, because the mean of its divisors is an integer number (10006885102189).

Almost surely, 2^{20013770204377} is an apocalyptic number.

It is an amenable number.

20013770204377 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013770204377 is an equidigital number, since it uses as much as digits as its factorization.

20013770204377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345744, while the sum is 43.

Adding to 20013770204377 its reverse (77340207731002), we get a palindrome (97353977935379).

The spelling of 20013770204377 in words is "twenty trillion, thirteen billion, seven hundred seventy million, two hundred four thousand, three hundred seventy-seven".