23401434511 has 32 divisors (see below), whose sum is σ = 29769272960. Its totient is φ = 17899854336.

The previous prime is 23401434503. The next prime is 23401434523. The reversal of 23401434511 is 11543410432.

It is not a de Polignac number, because 23401434511 - 2³ = 23401434503 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23401434511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23401434011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 506485 + ... + 550753.

It is an arithmetic number, because the mean of its divisors is an integer number (930289780).

Almost surely, 2^23401434511 is an apocalyptic number.

23401434511 is a deficient number, since it is larger than the sum of its proper divisors (6367838449).

23401434511 is a wasteful number, since it uses less digits than its factorization.

23401434511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44483.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 23401434511 its reverse (11543410432), we get a palindrome (34944844943).

The spelling of 23401434511 in words is "twenty-three billion, four hundred one million, four hundred thirty-four thousand, five hundred eleven".