23521613983 has 4 divisors (see below), whose sum is σ = 26881844560. Its totient is φ = 20161383408.

The previous prime is 23521613953. The next prime is 23521614029. The reversal of 23521613983 is 38931612532.

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

It is a cyclic number.

It is not a de Polignac number, because 23521613983 - 2¹³ = 23521605791 is a prime.

It is a super-2 number, since 2×23521613983² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23521613923) 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, 1680115278 + ... + 1680115291.

It is an arithmetic number, because the mean of its divisors is an integer number (6720461140).

Almost surely, 2^23521613983 is an apocalyptic number.

23521613983 is a deficient number, since it is larger than the sum of its proper divisors (3360230577).

23521613983 is an equidigital number, since it uses as much as digits as its factorization.

23521613983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3360230576.

The product of its digits is 233280, while the sum is 43.

The spelling of 23521613983 in words is "twenty-three billion, five hundred twenty-one million, six hundred thirteen thousand, nine hundred eighty-three".