23437242509 has 2 divisors, whose sum is σ = 23437242510. Its totient is φ = 23437242508.

The previous prime is 23437242481. The next prime is 23437242547. The reversal of 23437242509 is 90524273432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18536822500 + 4900420009 = 136150^2 + 70003^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23437242509 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23437242599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11718621254 + 11718621255.

It is an arithmetic number, because the mean of its divisors is an integer number (11718621255).

Almost surely, 2^23437242509 is an apocalyptic number.

It is an amenable number.

23437242509 is a deficient number, since it is larger than the sum of its proper divisors (1).

23437242509 is an equidigital number, since it uses as much as digits as its factorization.

23437242509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 41.

The spelling of 23437242509 in words is "twenty-three billion, four hundred thirty-seven million, two hundred forty-two thousand, five hundred nine".