11513421444 has 48 divisors (see below), whose sum is σ = 30811010048. Its totient is φ = 3277918368.

The previous prime is 11513421433. The next prime is 11513421449. The reversal of 11513421444 is 44412431511.

It is not an unprimeable number, because it can be changed into a prime (11513421449) 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, 218392 + ... + 265935.

Almost surely, 2^11513421444 is an apocalyptic number.

11513421444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

11513421444 is an abundant number, since it is smaller than the sum of its proper divisors (19297588604).

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

11513421444 is a wasteful number, since it uses less digits than its factorization.

11513421444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484624 (or 484622 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

Adding to 11513421444 its reverse (44412431511), we get a palindrome (55925852955).

The spelling of 11513421444 in words is "eleven billion, five hundred thirteen million, four hundred twenty-one thousand, four hundred forty-four".