23740607509 has 4 divisors (see below), whose sum is σ = 23742404620. Its totient is φ = 23738810400.

The previous prime is 23740607503. The next prime is 23740607533. The reversal of 23740607509 is 90570604732.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3305905009 + 20434702500 = 57497^2 + 142950^2 .

It is a cyclic number.

It is not a de Polignac number, because 23740607509 - 2⁷ = 23740607381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23740607503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 878592 + ... + 905209.

It is an arithmetic number, because the mean of its divisors is an integer number (5935601155).

Almost surely, 2^23740607509 is an apocalyptic number.

It is an amenable number.

23740607509 is a deficient number, since it is larger than the sum of its proper divisors (1797111).

23740607509 is a wasteful number, since it uses less digits than its factorization.

23740607509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1797110.

The product of its (nonzero) digits is 317520, while the sum is 43.

The spelling of 23740607509 in words is "twenty-three billion, seven hundred forty million, six hundred seven thousand, five hundred nine".