20120516077 has 2 divisors, whose sum is σ = 20120516078. Its totient is φ = 20120516076.

The previous prime is 20120516063. The next prime is 20120516093. The reversal of 20120516077 is 77061502102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17330669316 + 2789846761 = 131646^2 + 52819^2 .

It is a cyclic number.

It is not a de Polignac number, because 20120516077 - 2⁷ = 20120515949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20120516027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060258038 + 10060258039.

It is an arithmetic number, because the mean of its divisors is an integer number (10060258039).

Almost surely, 2^20120516077 is an apocalyptic number.

It is an amenable number.

20120516077 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120516077 is an equidigital number, since it uses as much as digits as its factorization.

20120516077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5880, while the sum is 31.

The spelling of 20120516077 in words is "twenty billion, one hundred twenty million, five hundred sixteen thousand, seventy-seven".