20455201492477 has 2 divisors, whose sum is σ = 20455201492478. Its totient is φ = 20455201492476.

The previous prime is 20455201492381. The next prime is 20455201492483. The reversal of 20455201492477 is 77429410255402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17525852859321 + 2929348633156 = 4186389^2 + 1711534^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20455201492477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20455201492277) 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, 10227600746238 + 10227600746239.

It is an arithmetic number, because the mean of its divisors is an integer number (10227600746239).

Almost surely, 2^{20455201492477} is an apocalyptic number.

It is an amenable number.

20455201492477 is a deficient number, since it is larger than the sum of its proper divisors (1).

20455201492477 is an equidigital number, since it uses as much as digits as its factorization.

20455201492477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5644800, while the sum is 52.

The spelling of 20455201492477 in words is "twenty trillion, four hundred fifty-five billion, two hundred one million, four hundred ninety-two thousand, four hundred seventy-seven".