11313021440 has 80 divisors (see below), whose sum is σ = 30999748032. Its totient is φ = 3878744064.

The previous prime is 11313021427. The next prime is 11313021451. The reversal of 11313021440 is 4412031311.

It is a tau number, because it is divible by the number of its divisors (80).

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 7 ways as a sum of consecutive naturals, for example, 297734 + ... + 333573.

Almost surely, 2^11313021440 is an apocalyptic number.

11313021440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11313021440 is an abundant number, since it is smaller than the sum of its proper divisors (19686726592).

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

11313021440 is an frugal number, since it uses more digits than its factorization.

11313021440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631337 (or 631321 counting only the distinct ones).

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

Adding to 11313021440 its reverse (4412031311), we get a palindrome (15725052751).

The spelling of 11313021440 in words is "eleven billion, three hundred thirteen million, twenty-one thousand, four hundred forty".