21439154000275 has 12 divisors (see below), whose sum is σ = 29001328320744. Its totient is φ = 15592112000000.

The previous prime is 21439154000273. The next prime is 21439154000339. The reversal of 21439154000275 is 57200045193412.

It is not a de Polignac number, because 21439154000275 - 2¹ = 21439154000273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21439154000273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38980279726 + ... + 38980280275.

It is an arithmetic number, because the mean of its divisors is an integer number (2416777360062).

Almost surely, 2^{21439154000275} is an apocalyptic number.

21439154000275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21439154000275 is a deficient number, since it is larger than the sum of its proper divisors (7562174320469).

21439154000275 is a wasteful number, since it uses less digits than its factorization.

21439154000275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77960560022 (or 77960560017 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 43.

Adding to 21439154000275 its reverse (57200045193412), we get a palindrome (78639199193687).

The spelling of 21439154000275 in words is "twenty-one trillion, four hundred thirty-nine billion, one hundred fifty-four million, two hundred seventy-five", and thus it is an aban number.