20478611147 has 2 divisors, whose sum is σ = 20478611148. Its totient is φ = 20478611146.

The previous prime is 20478611137. The next prime is 20478611159. The reversal of 20478611147 is 74111687402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20478611147 - 2⁸ = 20478610891 is a prime.

It is not a weakly prime, because it can be changed into another prime (20478611137) 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, 10239305573 + 10239305574.

It is an arithmetic number, because the mean of its divisors is an integer number (10239305574).

Almost surely, 2^20478611147 is an apocalyptic number.

20478611147 is a deficient number, since it is larger than the sum of its proper divisors (1).

20478611147 is an equidigital number, since it uses as much as digits as its factorization.

20478611147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75264, while the sum is 41.

The spelling of 20478611147 in words is "twenty billion, four hundred seventy-eight million, six hundred eleven thousand, one hundred forty-seven".