20948365129 has 2 divisors, whose sum is σ = 20948365130. Its totient is φ = 20948365128.

The previous prime is 20948365117. The next prime is 20948365153. The reversal of 20948365129 is 92156384902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18590777104 + 2357588025 = 136348^2 + 48555^2 .

It is a cyclic number.

It is not a de Polignac number, because 20948365129 - 2⁷ = 20948365001 is a prime.

It is not a weakly prime, because it can be changed into another prime (20948365199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10474182564 + 10474182565.

It is an arithmetic number, because the mean of its divisors is an integer number (10474182565).

Almost surely, 2^20948365129 is an apocalyptic number.

It is an amenable number.

20948365129 is a deficient number, since it is larger than the sum of its proper divisors (1).

20948365129 is an equidigital number, since it uses as much as digits as its factorization.

20948365129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 49.

The spelling of 20948365129 in words is "twenty billion, nine hundred forty-eight million, three hundred sixty-five thousand, one hundred twenty-nine".