21142043132 has 72 divisors (see below), whose sum is σ = 45608572800. Its totient is φ = 8520830976.

The previous prime is 21142043123. The next prime is 21142043173. The reversal of 21142043132 is 23134024112.

It is a junction number, because it is equal to n+sod(n) for n = 21142043098 and 21142043107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6292469 + ... + 6295827.

It is an arithmetic number, because the mean of its divisors is an integer number (633452400).

Almost surely, 2^21142043132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21142043132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22804286400).

21142043132 is an abundant number, since it is smaller than the sum of its proper divisors (24466529668).

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

21142043132 is a wasteful number, since it uses less digits than its factorization.

21142043132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5283 (or 5274 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21142043132 its reverse (23134024112), we get a palindrome (44276067244).

The spelling of 21142043132 in words is "twenty-one billion, one hundred forty-two million, forty-three thousand, one hundred thirty-two".