11203131440 has 20 divisors (see below), whose sum is σ = 26047280784. Its totient is φ = 4481252544.

The previous prime is 11203131437. The next prime is 11203131451. The reversal of 11203131440 is 4413130211.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70019492 + ... + 70019651.

Almost surely, 2^11203131440 is an apocalyptic number.

11203131440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11203131440 is an abundant number, since it is smaller than the sum of its proper divisors (14844149344).

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

11203131440 is a wasteful number, since it uses less digits than its factorization.

11203131440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140039156 (or 140039150 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 11203131440 its reverse (4413130211), we get a palindrome (15616261651).

The spelling of 11203131440 in words is "eleven billion, two hundred three million, one hundred thirty-one thousand, four hundred forty".