20133120444 has 12 divisors (see below), whose sum is σ = 46977281064. Its totient is φ = 6711040144.

The previous prime is 20133120437. The next prime is 20133120473. The reversal of 20133120444 is 44402133102.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×20133120444² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 838880007 + ... + 838880030.

It is an arithmetic number, because the mean of its divisors is an integer number (3914773422).

Almost surely, 2^20133120444 is an apocalyptic number.

It is an amenable number.

20133120444 is an abundant number, since it is smaller than the sum of its proper divisors (26844160620).

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

20133120444 is a wasteful number, since it uses less digits than its factorization.

20133120444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1677760044 (or 1677760042 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 20133120444 its reverse (44402133102), we get a palindrome (64535253546).

The spelling of 20133120444 in words is "twenty billion, one hundred thirty-three million, one hundred twenty thousand, four hundred forty-four".