20537312011 has 2 divisors, whose sum is σ = 20537312012. Its totient is φ = 20537312010.

The previous prime is 20537311979. The next prime is 20537312071. The reversal of 20537312011 is 11021373502.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20537312011 - 2⁵ = 20537311979 is a prime.

It is not a weakly prime, because it can be changed into another prime (20537312071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10268656005 + 10268656006.

It is an arithmetic number, because the mean of its divisors is an integer number (10268656006).

Almost surely, 2^20537312011 is an apocalyptic number.

20537312011 is a deficient number, since it is larger than the sum of its proper divisors (1).

20537312011 is an equidigital number, since it uses as much as digits as its factorization.

20537312011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 25.

Adding to 20537312011 its reverse (11021373502), we get a palindrome (31558685513).

The spelling of 20537312011 in words is "twenty billion, five hundred thirty-seven million, three hundred twelve thousand, eleven".