21442023402352 has 80 divisors (see below), whose sum is σ = 50633301761280. Its totient is φ = 8586661100544.

The previous prime is 21442023402337. The next prime is 21442023402361. The reversal of 21442023402352 is 25320432024412.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40244578 + ... + 40773889.

It is an arithmetic number, because the mean of its divisors is an integer number (632916272016).

Almost surely, 2^{21442023402352} is an apocalyptic number.

It is an amenable number.

21442023402352 is an abundant number, since it is smaller than the sum of its proper divisors (29191278358928).

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

21442023402352 is a wasteful number, since it uses less digits than its factorization.

21442023402352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81018638 (or 81018632 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 34.

Adding to 21442023402352 its reverse (25320432024412), we get a palindrome (46762455426764).

The spelling of 21442023402352 in words is "twenty-one trillion, four hundred forty-two billion, twenty-three million, four hundred two thousand, three hundred fifty-two".