23503421311 has 16 divisors (see below), whose sum is σ = 25289297920. Its totient is φ = 21800132640.

The previous prime is 23503421303. The next prime is 23503421317. The reversal of 23503421311 is 11312430532.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 23503421311 - 2³ = 23503421303 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 (23503421317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76071 + ... + 229768.

It is an arithmetic number, because the mean of its divisors is an integer number (1580581120).

Almost surely, 2^23503421311 is an apocalyptic number.

23503421311 is a deficient number, since it is larger than the sum of its proper divisors (1785876609).

23503421311 is a wasteful number, since it uses less digits than its factorization.

23503421311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305974.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 23503421311 its reverse (11312430532), we get a palindrome (34815851843).

The spelling of 23503421311 in words is "twenty-three billion, five hundred three million, four hundred twenty-one thousand, three hundred eleven".