20361313354477 has 2 divisors, whose sum is σ = 20361313354478. Its totient is φ = 20361313354476.

The previous prime is 20361313354427. The next prime is 20361313354483. The reversal of 20361313354477 is 77445331316302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12265586955076 + 8095726399401 = 3502226^2 + 2845299^2 .

It is a cyclic number.

It is not a de Polignac number, because 20361313354477 - 2³¹ = 20359165870829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20361313354477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20361313354427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10180656677238 + 10180656677239.

It is an arithmetic number, because the mean of its divisors is an integer number (10180656677239).

Almost surely, 2^{20361313354477} is an apocalyptic number.

It is an amenable number.

20361313354477 is a deficient number, since it is larger than the sum of its proper divisors (1).

20361313354477 is an equidigital number, since it uses as much as digits as its factorization.

20361313354477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3810240, while the sum is 49.

The spelling of 20361313354477 in words is "twenty trillion, three hundred sixty-one billion, three hundred thirteen million, three hundred fifty-four thousand, four hundred seventy-seven".