21141333444 has 72 divisors (see below), whose sum is σ = 61968015424. Its totient is φ = 5491252800.

The previous prime is 21141333403. The next prime is 21141333491. The reversal of 21141333444 is 44433314112.

It is a super-2 number, since 2×21141333444² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1029847 + ... + 1050174.

Almost surely, 2^21141333444 is an apocalyptic number.

It is an amenable number.

21141333444 is an abundant number, since it is smaller than the sum of its proper divisors (40826681980).

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

21141333444 is a wasteful number, since it uses less digits than its factorization.

21141333444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2080057 (or 2080044 counting only the distinct ones).

The product of its digits is 13824, while the sum is 30.

Adding to 21141333444 its reverse (44433314112), we get a palindrome (65574647556).

The spelling of 21141333444 in words is "twenty-one billion, one hundred forty-one million, three hundred thirty-three thousand, four hundred forty-four".