21949283572481 has 8 divisors (see below), whose sum is σ = 23241954119904. Its totient is φ = 20656783716160.

The previous prime is 21949283572423. The next prime is 21949283572493. The reversal of 21949283572481 is 18427538294912.

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

It is not a de Polignac number, because 21949283572481 - 2²⁶ = 21949216463617 is a prime.

It is a super-2 number, since 2×21949283572481² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21949783572481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42407975 + ... + 42922428.

It is an arithmetic number, because the mean of its divisors is an integer number (2905244264988).

Almost surely, 2^{21949283572481} is an apocalyptic number.

It is an amenable number.

21949283572481 is a deficient number, since it is larger than the sum of its proper divisors (1292670547423).

21949283572481 is a wasteful number, since it uses less digits than its factorization.

21949283572481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85345551.

The product of its digits is 69672960, while the sum is 65.

The spelling of 21949283572481 in words is "twenty-one trillion, nine hundred forty-nine billion, two hundred eighty-three million, five hundred seventy-two thousand, four hundred eighty-one".