13533023444 has 24 divisors (see below), whose sum is σ = 24024345408. Its totient is φ = 6668988480.

The previous prime is 13533023419. The next prime is 13533023447. The reversal of 13533023444 is 44432033531.

It is a super-2 number, since 2×13533023444² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13533023444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13533023447) 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, 1137752 + ... + 1149584.

It is an arithmetic number, because the mean of its divisors is an integer number (1001014392).

Almost surely, 2^13533023444 is an apocalyptic number.

It is an amenable number.

13533023444 is a deficient number, since it is larger than the sum of its proper divisors (10491321964).

13533023444 is a wasteful number, since it uses less digits than its factorization.

13533023444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15935 (or 15933 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 32.

Adding to 13533023444 its reverse (44432033531), we get a palindrome (57965056975).

The spelling of 13533023444 in words is "thirteen billion, five hundred thirty-three million, twenty-three thousand, four hundred forty-four".