20409624293 has 2 divisors, whose sum is σ = 20409624294. Its totient is φ = 20409624292.

The previous prime is 20409624283. The next prime is 20409624331. The reversal of 20409624293 is 39242690402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20244167524 + 165456769 = 142282^2 + 12863^2 .

It is a cyclic number.

It is not a de Polignac number, because 20409624293 - 2³⁰ = 19335882469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20409624293.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20409624203) 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, 10204812146 + 10204812147.

It is an arithmetic number, because the mean of its divisors is an integer number (10204812147).

Almost surely, 2^20409624293 is an apocalyptic number.

It is an amenable number.

20409624293 is a deficient number, since it is larger than the sum of its proper divisors (1).

20409624293 is an equidigital number, since it uses as much as digits as its factorization.

20409624293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 41.

The spelling of 20409624293 in words is "twenty billion, four hundred nine million, six hundred twenty-four thousand, two hundred ninety-three".