23505373405 has 4 divisors (see below), whose sum is σ = 28206448092. Its totient is φ = 18804298720.

The previous prime is 23505373403. The next prime is 23505373421. The reversal of 23505373405 is 50437350532.

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 17720401924 + 5784971481 = 133118^2 + 76059^2 .

It is not a de Polignac number, because 23505373405 - 2¹ = 23505373403 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 (23505373403) 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, 2350537336 + ... + 2350537345.

It is an arithmetic number, because the mean of its divisors is an integer number (7051612023).

Almost surely, 2^23505373405 is an apocalyptic number.

It is an amenable number.

23505373405 is a deficient number, since it is larger than the sum of its proper divisors (4701074687).

23505373405 is an equidigital number, since it uses as much as digits as its factorization.

23505373405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4701074686.

The product of its (nonzero) digits is 189000, while the sum is 37.

The spelling of 23505373405 in words is "twenty-three billion, five hundred five million, three hundred seventy-three thousand, four hundred five".