20627139229 has 2 divisors, whose sum is σ = 20627139230. Its totient is φ = 20627139228.

The previous prime is 20627139191. The next prime is 20627139251. The reversal of 20627139229 is 92293172602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12249398329 + 8377740900 = 110677^2 + 91530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20627139229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20627139529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10313569614 + 10313569615.

It is an arithmetic number, because the mean of its divisors is an integer number (10313569615).

Almost surely, 2^20627139229 is an apocalyptic number.

It is an amenable number.

20627139229 is a deficient number, since it is larger than the sum of its proper divisors (1).

20627139229 is an equidigital number, since it uses as much as digits as its factorization.

20627139229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 43.

The spelling of 20627139229 in words is "twenty billion, six hundred twenty-seven million, one hundred thirty-nine thousand, two hundred twenty-nine".