20436502147 has 2 divisors, whose sum is σ = 20436502148. Its totient is φ = 20436502146.

The previous prime is 20436502139. The next prime is 20436502157. The reversal of 20436502147 is 74120563402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20436502147 - 2³ = 20436502139 is a prime.

It is not a weakly prime, because it can be changed into another prime (20436502157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10218251073 + 10218251074.

It is an arithmetic number, because the mean of its divisors is an integer number (10218251074).

Almost surely, 2^20436502147 is an apocalyptic number.

20436502147 is a deficient number, since it is larger than the sum of its proper divisors (1).

20436502147 is an equidigital number, since it uses as much as digits as its factorization.

20436502147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 34.

The spelling of 20436502147 in words is "twenty billion, four hundred thirty-six million, five hundred two thousand, one hundred forty-seven".