13644469020 has 384 divisors, whose sum is σ = 48548892672. Its totient is φ = 2786918400.

The previous prime is 13644469001. The next prime is 13644469063. The reversal of 13644469020 is 2096444631.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 13644469020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 23646972 + ... + 23647548.

It is an arithmetic number, because the mean of its divisors is an integer number (126429408).

Almost surely, 2^13644469020 is an apocalyptic number.

13644469020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13644469020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24274446336).

13644469020 is an abundant number, since it is smaller than the sum of its proper divisors (34904423652).

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

13644469020 is a wasteful number, since it uses less digits than its factorization.

13644469020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741 (or 739 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 39.

The spelling of 13644469020 in words is "thirteen billion, six hundred forty-four million, four hundred sixty-nine thousand, twenty".