20933178113 has 2 divisors, whose sum is σ = 20933178114. Its totient is φ = 20933178112.

The previous prime is 20933178109. The next prime is 20933178121. The reversal of 20933178113 is 31187133902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19973603584 + 959574529 = 141328^2 + 30977^2 .

It is a cyclic number.

It is not a de Polignac number, because 20933178113 - 2² = 20933178109 is a prime.

It is not a weakly prime, because it can be changed into another prime (20933178193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10466589056 + 10466589057.

It is an arithmetic number, because the mean of its divisors is an integer number (10466589057).

Almost surely, 2^20933178113 is an apocalyptic number.

It is an amenable number.

20933178113 is a deficient number, since it is larger than the sum of its proper divisors (1).

20933178113 is an equidigital number, since it uses as much as digits as its factorization.

20933178113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The spelling of 20933178113 in words is "twenty billion, nine hundred thirty-three million, one hundred seventy-eight thousand, one hundred thirteen".