20312077 has 2 divisors, whose sum is σ = 20312078. Its totient is φ = 20312076.

The previous prime is 20312063. The next prime is 20312111. The reversal of 20312077 is 77021302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10458756 + 9853321 = 3234^2 + 3139^2 .

It is a cyclic number.

It is not a de Polignac number, because 20312077 - 2¹¹ = 20310029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20312057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10156038 + 10156039.

It is an arithmetic number, because the mean of its divisors is an integer number (10156039).

Almost surely, 2^20312077 is an apocalyptic number.

It is an amenable number.

20312077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20312077 is an equidigital number, since it uses as much as digits as its factorization.

20312077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 20312077 is about 4506.8921664491. The cubic root of 20312077 is about 272.8463267657.

Adding to 20312077 its reverse (77021302), we get a palindrome (97333379).

The spelling of 20312077 in words is "twenty million, three hundred twelve thousand, seventy-seven".