23511005021 has 12 divisors (see below), whose sum is σ = 27369165600. Its totient is φ = 20137826520.

The previous prime is 23511004973. The next prime is 23511005029. The reversal of 23511005021 is 12050011532.

It is a happy number.

It is not a de Polignac number, because 23511005021 - 2¹⁴ = 23510988637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23511004984 and 23511005002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23511005029) 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 11 ways as a sum of consecutive naturals, for example, 102935 + ... + 240036.

It is an arithmetic number, because the mean of its divisors is an integer number (2280763800).

Almost surely, 2^23511005021 is an apocalyptic number.

It is an amenable number.

23511005021 is a deficient number, since it is larger than the sum of its proper divisors (3858160579).

23511005021 is a wasteful number, since it uses less digits than its factorization.

23511005021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344384 (or 344377 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

Adding to 23511005021 its reverse (12050011532), we get a palindrome (35561016553).

The spelling of 23511005021 in words is "twenty-three billion, five hundred eleven million, five thousand, twenty-one".