20013232777 has 2 divisors, whose sum is σ = 20013232778. Its totient is φ = 20013232776.

The previous prime is 20013232769. The next prime is 20013232781. The reversal of 20013232777 is 77723231002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19921628736 + 91604041 = 141144^2 + 9571^2 .

It is a cyclic number.

It is not a de Polignac number, because 20013232777 - 2³ = 20013232769 is a prime.

It is not a weakly prime, because it can be changed into another prime (20013212777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006616388 + 10006616389.

It is an arithmetic number, because the mean of its divisors is an integer number (10006616389).

Almost surely, 2^20013232777 is an apocalyptic number.

It is an amenable number.

20013232777 is a deficient number, since it is larger than the sum of its proper divisors (1).

20013232777 is an equidigital number, since it uses as much as digits as its factorization.

20013232777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24696, while the sum is 34.

Adding to 20013232777 its reverse (77723231002), we get a palindrome (97736463779).

The spelling of 20013232777 in words is "twenty billion, thirteen million, two hundred thirty-two thousand, seven hundred seventy-seven".