21442023402432 has 112 divisors (see below), whose sum is σ = 58688576950272. Its totient is φ = 6901841802240.

The previous prime is 21442023402389. The next prime is 21442023402451. The reversal of 21442023402432 is 23420432024412.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21442023402393 and 21442023402402.

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, 1134603 + ... + 6646154.

Almost surely, 2^{21442023402432} is an apocalyptic number.

It is an amenable number.

21442023402432 is an abundant number, since it is smaller than the sum of its proper divisors (37246553547840).

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

21442023402432 is a wasteful number, since it uses less digits than its factorization.

21442023402432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7781266 (or 7781256 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 33.

Adding to 21442023402432 its reverse (23420432024412), we get a palindrome (44862455426844).

The spelling of 21442023402432 in words is "twenty-one trillion, four hundred forty-two billion, twenty-three million, four hundred two thousand, four hundred thirty-two".