20052111977 has 2 divisors, whose sum is σ = 20052111978. Its totient is φ = 20052111976.

The previous prime is 20052111971. The next prime is 20052112033. The reversal of 20052111977 is 77911125002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13740762841 + 6311349136 = 117221^2 + 79444^2 .

It is a cyclic number.

It is not a de Polignac number, because 20052111977 - 2¹⁸ = 20051849833 is a prime.

It is not a weakly prime, because it can be changed into another prime (20052111971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10026055988 + 10026055989.

It is an arithmetic number, because the mean of its divisors is an integer number (10026055989).

Almost surely, 2^20052111977 is an apocalyptic number.

It is an amenable number.

20052111977 is a deficient number, since it is larger than the sum of its proper divisors (1).

20052111977 is an equidigital number, since it uses as much as digits as its factorization.

20052111977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8820, while the sum is 35.

Adding to 20052111977 its reverse (77911125002), we get a palindrome (97963236979).

The spelling of 20052111977 in words is "twenty billion, fifty-two million, one hundred eleven thousand, nine hundred seventy-seven".