11423403421 has 16 divisors (see below), whose sum is σ = 12363874560. Its totient is φ = 10517532480.

The previous prime is 11423403379. The next prime is 11423403457. The reversal of 11423403421 is 12430432411.

It is a cyclic number.

It is not a de Polignac number, because 11423403421 - 2⁷ = 11423403293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11421403421) 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, 631515 + ... + 649351.

It is an arithmetic number, because the mean of its divisors is an integer number (772742160).

Almost surely, 2^11423403421 is an apocalyptic number.

It is an amenable number.

11423403421 is a deficient number, since it is larger than the sum of its proper divisors (940471139).

11423403421 is a wasteful number, since it uses less digits than its factorization.

11423403421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18804.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 11423403421 its reverse (12430432411), we get a palindrome (23853835832).

The spelling of 11423403421 in words is "eleven billion, four hundred twenty-three million, four hundred three thousand, four hundred twenty-one".