21442553033136 has 40 divisors (see below), whose sum is σ = 58651689181104. Its totient is φ = 6727075461120.

The previous prime is 21442553033113. The next prime is 21442553033141. The reversal of 21442553033136 is 63133035524412.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13138818445 + ... + 13138820076.

Almost surely, 2^{21442553033136} is an apocalyptic number.

It is an amenable number.

21442553033136 is an abundant number, since it is smaller than the sum of its proper divisors (37209136147968).

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

21442553033136 is a wasteful number, since it uses less digits than its factorization.

21442553033136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26277638549 (or 26277638543 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 42.

Adding to 21442553033136 its reverse (63133035524412), we get a palindrome (84575588557548).

The spelling of 21442553033136 in words is "twenty-one trillion, four hundred forty-two billion, five hundred fifty-three million, thirty-three thousand, one hundred thirty-six".