20234017847 has 4 divisors (see below), whose sum is σ = 20256229536. Its totient is φ = 20211806160.

The previous prime is 20234017829. The next prime is 20234017873. The reversal of 20234017847 is 74871043202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20234017847 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20234017847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20234017807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11104478 + ... + 11106299.

It is an arithmetic number, because the mean of its divisors is an integer number (5064057384).

Almost surely, 2^20234017847 is an apocalyptic number.

20234017847 is a deficient number, since it is larger than the sum of its proper divisors (22211689).

20234017847 is an equidigital number, since it uses as much as digits as its factorization.

20234017847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22211688.

The product of its (nonzero) digits is 75264, while the sum is 38.

The spelling of 20234017847 in words is "twenty billion, two hundred thirty-four million, seventeen thousand, eight hundred forty-seven".