13020444 has 18 divisors (see below), whose sum is σ = 32912880. Its totient is φ = 4340136.

The previous prime is 13020439. The next prime is 13020467. The reversal of 13020444 is 44402031.

13020444 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 180804 + ... + 180875.

Almost surely, 2^13020444 is an apocalyptic number.

It is an amenable number.

13020444 is an abundant number, since it is smaller than the sum of its proper divisors (19892436).

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

13020444 is a wasteful number, since it uses less digits than its factorization.

13020444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361689 (or 361684 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 13020444 is about 3608.3852344227. The cubic root of 13020444 is about 235.2566623860.

Adding to 13020444 its reverse (44402031), we get a palindrome (57422475).

The spelling of 13020444 in words is "thirteen million, twenty thousand, four hundred forty-four".