23328421537 has 4 divisors (see below), whose sum is σ = 24080951296. Its totient is φ = 22575891780.

The previous prime is 23328421433. The next prime is 23328421591. The reversal of 23328421537 is 73512482332.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23328421537 - 2²³ = 23320032929 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 23328421537.

It is not an unprimeable number, because it can be changed into a prime (23328431537) 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, 376264833 + ... + 376264894.

It is an arithmetic number, because the mean of its divisors is an integer number (6020237824).

Almost surely, 2^23328421537 is an apocalyptic number.

It is an amenable number.

23328421537 is a deficient number, since it is larger than the sum of its proper divisors (752529759).

23328421537 is an equidigital number, since it uses as much as digits as its factorization.

23328421537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752529758.

The product of its digits is 241920, while the sum is 40.

The spelling of 23328421537 in words is "twenty-three billion, three hundred twenty-eight million, four hundred twenty-one thousand, five hundred thirty-seven".