21448145049 has 8 divisors (see below), whose sum is σ = 29295027552. Its totient is φ = 13950012960.

The previous prime is 21448145039. The next prime is 21448145063. The reversal of 21448145049 is 94054184412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21448145049 - 2¹¹ = 21448143001 is a prime.

It is a super-3 number, since 3×21448145049³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21448145049.

It is not an unprimeable number, because it can be changed into a prime (21448145039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87187459 + ... + 87187704.

It is an arithmetic number, because the mean of its divisors is an integer number (3661878444).

Almost surely, 2^21448145049 is an apocalyptic number.

It is an amenable number.

21448145049 is a deficient number, since it is larger than the sum of its proper divisors (7846882503).

21448145049 is a wasteful number, since it uses less digits than its factorization.

21448145049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174375207.

The product of its (nonzero) digits is 184320, while the sum is 42.

The spelling of 21448145049 in words is "twenty-one billion, four hundred forty-eight million, one hundred forty-five thousand, forty-nine".