11431020 has 48 divisors (see below), whose sum is σ = 32161248. Its totient is φ = 3033600.

The previous prime is 11431003. The next prime is 11431037. The reversal of 11431020 is 2013411.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11431003) and next prime (11431037).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 11430987 and 11431005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18720 + ... + 19320.

It is an arithmetic number, because the mean of its divisors is an integer number (670026).

Almost surely, 2^11431020 is an apocalyptic number.

11431020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11431020 is an abundant number, since it is smaller than the sum of its proper divisors (20730228).

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

11431020 is a wasteful number, since it uses less digits than its factorization.

11431020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930 (or 928 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 11431020 is about 3380.9791481167. The cubic root of 11431020 is about 225.2656615139.

Adding to 11431020 its reverse (2013411), we get a palindrome (13444431).

The spelling of 11431020 in words is "eleven million, four hundred thirty-one thousand, twenty".