12013503444 has 24 divisors (see below), whose sum is σ = 31146120320. Its totient is φ = 4004501112.

The previous prime is 12013503427. The next prime is 12013503449. The reversal of 12013503444 is 44430531021.

It is a happy number.

It is a super-2 number, since 2×12013503444² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12013503449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55617964 + ... + 55618179.

Almost surely, 2^12013503444 is an apocalyptic number.

It is an amenable number.

12013503444 is an abundant number, since it is smaller than the sum of its proper divisors (19132616876).

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

12013503444 is a wasteful number, since it uses less digits than its factorization.

12013503444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111236156 (or 111236148 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The spelling of 12013503444 in words is "twelve billion, thirteen million, five hundred three thousand, four hundred forty-four".