21440014529 has 4 divisors (see below), whose sum is σ = 21636712020. Its totient is φ = 21243317040.

The previous prime is 21440014513. The next prime is 21440014577. The reversal of 21440014529 is 92541004412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7284963904 + 14155050625 = 85352^2 + 118975^2 .

It is a cyclic number.

It is not a de Polignac number, because 21440014529 - 2⁴ = 21440014513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21440014495 and 21440014504.

It is not an unprimeable number, because it can be changed into a prime (21440014579) 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 3 ways as a sum of consecutive naturals, for example, 98348582 + ... + 98348799.

It is an arithmetic number, because the mean of its divisors is an integer number (5409178005).

Almost surely, 2^21440014529 is an apocalyptic number.

It is an amenable number.

21440014529 is a deficient number, since it is larger than the sum of its proper divisors (196697491).

21440014529 is a wasteful number, since it uses less digits than its factorization.

21440014529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196697490.

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 21440014529 in words is "twenty-one billion, four hundred forty million, fourteen thousand, five hundred twenty-nine".