21134433144 has 64 divisors (see below), whose sum is σ = 57957943680. Its totient is φ = 6368976000.

The previous prime is 21134433119. The next prime is 21134433157. The reversal of 21134433144 is 44133443112.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173362 + ... + 268929.

It is an arithmetic number, because the mean of its divisors is an integer number (905592870).

Almost surely, 2^21134433144 is an apocalyptic number.

21134433144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21134433144 is an abundant number, since it is smaller than the sum of its proper divisors (36823510536).

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

21134433144 is a wasteful number, since it uses less digits than its factorization.

21134433144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442492 (or 442488 counting only the distinct ones).

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

Adding to 21134433144 its reverse (44133443112), we get a palindrome (65267876256).

The spelling of 21134433144 in words is "twenty-one billion, one hundred thirty-four million, four hundred thirty-three thousand, one hundred forty-four".