20236317077 has 2 divisors, whose sum is σ = 20236317078. Its totient is φ = 20236317076.

The previous prime is 20236317053. The next prime is 20236317089. The reversal of 20236317077 is 77071363202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13709131396 + 6527185681 = 117086^2 + 80791^2 .

It is a cyclic number.

It is not a de Polignac number, because 20236317077 - 2¹⁸ = 20236054933 is a prime.

It is a super-3 number, since 3×20236317077³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20236317077.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20236317007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10118158538 + 10118158539.

It is an arithmetic number, because the mean of its divisors is an integer number (10118158539).

Almost surely, 2^20236317077 is an apocalyptic number.

It is an amenable number.

20236317077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20236317077 is an equidigital number, since it uses as much as digits as its factorization.

20236317077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 74088, while the sum is 38.

The spelling of 20236317077 in words is "twenty billion, two hundred thirty-six million, three hundred seventeen thousand, seventy-seven".