23553993909 has 16 divisors (see below), whose sum is σ = 31573904960. Its totient is φ = 15618597120.

The previous prime is 23553993899. The next prime is 23553993973. The reversal of 23553993909 is 90939935532.

It is not a de Polignac number, because 23553993909 - 2⁸ = 23553993653 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 (23553993809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 397962 + ... + 453300.

It is an arithmetic number, because the mean of its divisors is an integer number (1973369060).

Almost surely, 2^23553993909 is an apocalyptic number.

It is an amenable number.

23553993909 is a deficient number, since it is larger than the sum of its proper divisors (8019911051).

23553993909 is a wasteful number, since it uses less digits than its factorization.

23553993909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56100.

The product of its (nonzero) digits is 8857350, while the sum is 57.

The spelling of 23553993909 in words is "twenty-three billion, five hundred fifty-three million, nine hundred ninety-three thousand, nine hundred nine".