20246513129 has 2 divisors, whose sum is σ = 20246513130. Its totient is φ = 20246513128.

The previous prime is 20246513081. The next prime is 20246513159. The reversal of 20246513129 is 92131564202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14125797904 + 6120715225 = 118852^2 + 78235^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20246513129 is a prime.

It is not a weakly prime, because it can be changed into another prime (20246513159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10123256564 + 10123256565.

It is an arithmetic number, because the mean of its divisors is an integer number (10123256565).

Almost surely, 2^20246513129 is an apocalyptic number.

It is an amenable number.

20246513129 is a deficient number, since it is larger than the sum of its proper divisors (1).

20246513129 is an equidigital number, since it uses as much as digits as its factorization.

20246513129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 20246513129 in words is "twenty billion, two hundred forty-six million, five hundred thirteen thousand, one hundred twenty-nine".