20365144363777 has 4 divisors (see below), whose sum is σ = 21022084504576. Its totient is φ = 19708204222980.

The previous prime is 20365144363747. The next prime is 20365144363873. The reversal of 20365144363777 is 77736344156302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20365144363777 - 2³¹ = 20362996880129 is a prime.

It is a super-2 number, since 2×20365144363777² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20365144363727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328470070353 + ... + 328470070414.

It is an arithmetic number, because the mean of its divisors is an integer number (5255521126144).

Almost surely, 2^{20365144363777} is an apocalyptic number.

It is an amenable number.

20365144363777 is a deficient number, since it is larger than the sum of its proper divisors (656940140799).

20365144363777 is an equidigital number, since it uses as much as digits as its factorization.

20365144363777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656940140798.

The product of its (nonzero) digits is 53343360, while the sum is 58.

The spelling of 20365144363777 in words is "twenty trillion, three hundred sixty-five billion, one hundred forty-four million, three hundred sixty-three thousand, seven hundred seventy-seven".