21444250421350 has 12 divisors (see below), whose sum is σ = 39886305783804. Its totient is φ = 8577700168520.

The previous prime is 21444250421329. The next prime is 21444250421369. The reversal of 21444250421350 is 5312405244412.

It is a super-2 number, since 2×21444250421350² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 214442504164 + ... + 214442504263.

It is an arithmetic number, because the mean of its divisors is an integer number (3323858815317).

Almost surely, 2^{21444250421350} is an apocalyptic number.

21444250421350 is a deficient number, since it is larger than the sum of its proper divisors (18442055362454).

21444250421350 is a wasteful number, since it uses less digits than its factorization.

21444250421350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428885008439 (or 428885008434 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 37.

Adding to 21444250421350 its reverse (5312405244412), we get a palindrome (26756655665762).

The spelling of 21444250421350 in words is "twenty-one trillion, four hundred forty-four billion, two hundred fifty million, four hundred twenty-one thousand, three hundred fifty".