21442023402450 has 48 divisors (see below), whose sum is σ = 60772820617920. Its totient is φ = 4901033920320.

The previous prime is 21442023402389. The next prime is 21442023402451. The reversal of 21442023402450 is 5420432024412.

It is not an unprimeable number, because it can be changed into a prime (21442023402451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10210486285 + ... + 10210488384.

It is an arithmetic number, because the mean of its divisors is an integer number (1266100429540).

Almost surely, 2^{21442023402450} is an apocalyptic number.

21442023402450 is an abundant number, since it is smaller than the sum of its proper divisors (39330797215470).

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

21442023402450 is a wasteful number, since it uses less digits than its factorization.

21442023402450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20420974691 (or 20420974686 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 33.

Adding to 21442023402450 its reverse (5420432024412), we get a palindrome (26862455426862).

The spelling of 21442023402450 in words is "twenty-one trillion, four hundred forty-two billion, twenty-three million, four hundred two thousand, four hundred fifty".