20434823051 has 2 divisors, whose sum is σ = 20434823052. Its totient is φ = 20434823050.

The previous prime is 20434823033. The next prime is 20434823083. The reversal of 20434823051 is 15032843402.

It is an a-pointer prime, because the next prime (20434823083) can be obtained adding 20434823051 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20434823051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20434822999 and 20434823017.

It is not a weakly prime, because it can be changed into another prime (20434813051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10217411525 + 10217411526.

It is an arithmetic number, because the mean of its divisors is an integer number (10217411526).

Almost surely, 2^20434823051 is an apocalyptic number.

20434823051 is a deficient number, since it is larger than the sum of its proper divisors (1).

20434823051 is an equidigital number, since it uses as much as digits as its factorization.

20434823051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 32.

The spelling of 20434823051 in words is "twenty billion, four hundred thirty-four million, eight hundred twenty-three thousand, fifty-one".