11523420 has 36 divisors (see below), whose sum is σ = 34954920. Its totient is φ = 3072864.

The previous prime is 11523403. The next prime is 11523427. The reversal of 11523420 is 2432511.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 11523393 and 11523402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11523427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31830 + ... + 32189.

It is an arithmetic number, because the mean of its divisors is an integer number (970970).

Almost surely, 2^11523420 is an apocalyptic number.

11523420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11523420 is an abundant number, since it is smaller than the sum of its proper divisors (23431500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11523420 is a wasteful number, since it uses less digits than its factorization.

11523420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64034 (or 64029 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 11523420 is about 3394.6163258902. The cubic root of 11523420 is about 225.8709943258.

Adding to 11523420 its reverse (2432511), we get a palindrome (13955931).

Subtracting from 11523420 its reverse (2432511), we obtain a palindrome (9090909).

The spelling of 11523420 in words is "eleven million, five hundred twenty-three thousand, four hundred twenty".