23440003405 has 24 divisors (see below), whose sum is σ = 34809305472. Its totient is φ = 14836745664.

The previous prime is 23440003369. The next prime is 23440003417. The reversal of 23440003405 is 50430004432.

It is not a de Polignac number, because 23440003405 - 2⁹ = 23440002893 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 23440003405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1975489 + ... + 1987318.

It is an arithmetic number, because the mean of its divisors is an integer number (1450387728).

Almost surely, 2^23440003405 is an apocalyptic number.

It is an amenable number.

23440003405 is a deficient number, since it is larger than the sum of its proper divisors (11369302067).

23440003405 is a wasteful number, since it uses less digits than its factorization.

23440003405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3962845 (or 3962832 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 25.

Adding to 23440003405 its reverse (50430004432), we get a palindrome (73870007837).

The spelling of 23440003405 in words is "twenty-three billion, four hundred forty million, three thousand, four hundred five".