20323620277 has 4 divisors (see below), whose sum is σ = 20340158220. Its totient is φ = 20307082336.

The previous prime is 20323620259. The next prime is 20323620293. The reversal of 20323620277 is 77202632302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13049406756 + 7274213521 = 114234^2 + 85289^2 .

It is a cyclic number.

It is not a de Polignac number, because 20323620277 - 2²⁷ = 20189402549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20323620217) 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, 8267128 + ... + 8269585.

It is an arithmetic number, because the mean of its divisors is an integer number (5085039555).

Almost surely, 2^20323620277 is an apocalyptic number.

It is an amenable number.

20323620277 is a deficient number, since it is larger than the sum of its proper divisors (16537943).

20323620277 is a wasteful number, since it uses less digits than its factorization.

20323620277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16537942.

The product of its (nonzero) digits is 42336, while the sum is 34.

The spelling of 20323620277 in words is "twenty billion, three hundred twenty-three million, six hundred twenty thousand, two hundred seventy-seven".