20133789144 has 96 divisors (see below), whose sum is σ = 58781058480. Its totient is φ = 5730041856.

The previous prime is 20133789119. The next prime is 20133789149. The reversal of 20133789144 is 44198733102.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 20133789096 and 20133789105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20133789149) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 268924 + ... + 335540.

Almost surely, 2^20133789144 is an apocalyptic number.

20133789144 is a gapful number since it is divisible by the number (24) 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 20133789144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29390529240).

20133789144 is an abundant number, since it is smaller than the sum of its proper divisors (38647269336).

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

20133789144 is a wasteful number, since it uses less digits than its factorization.

20133789144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66897 (or 66886 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 20133789144 in words is "twenty billion, one hundred thirty-three million, seven hundred eighty-nine thousand, one hundred forty-four".