21042411432 has 96 divisors (see below), whose sum is σ = 62056912320. Its totient is φ = 5927416320.

The previous prime is 21042411431. The next prime is 21042411449. The reversal of 21042411432 is 23411424012.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (21042411431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42513 + ... + 209504.

It is an arithmetic number, because the mean of its divisors is an integer number (646426170).

Almost surely, 2^21042411432 is an apocalyptic number.

It is an amenable number.

21042411432 is an abundant number, since it is smaller than the sum of its proper divisors (41014500888).

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

21042411432 is a wasteful number, since it uses less digits than its factorization.

21042411432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252111 (or 252100 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21042411432 its reverse (23411424012), we get a palindrome (44453835444).

The spelling of 21042411432 in words is "twenty-one billion, forty-two million, four hundred eleven thousand, four hundred thirty-two".