20364126077 has 2 divisors, whose sum is σ = 20364126078. Its totient is φ = 20364126076.

The previous prime is 20364126043. The next prime is 20364126131. The reversal of 20364126077 is 77062146302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18625152676 + 1738973401 = 136474^2 + 41701^2 .

It is a cyclic number.

It is not a de Polignac number, because 20364126077 - 2²² = 20359931773 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20364126077.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20364126037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10182063038 + 10182063039.

It is an arithmetic number, because the mean of its divisors is an integer number (10182063039).

Almost surely, 2^20364126077 is an apocalyptic number.

It is an amenable number.

20364126077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20364126077 is an equidigital number, since it uses as much as digits as its factorization.

20364126077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 38.

The spelling of 20364126077 in words is "twenty billion, three hundred sixty-four million, one hundred twenty-six thousand, seventy-seven".