21440514132535 has 16 divisors (see below), whose sum is σ = 25751462929920. Its totient is φ = 17137187435520.

The previous prime is 21440514132529. The next prime is 21440514132539. The reversal of 21440514132535 is 53523141504412.

It is not a de Polignac number, because 21440514132535 - 2²⁵ = 21440480578103 is a prime.

It is a super-3 number, since 3×21440514132535³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21440514132539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25024945 + ... + 25867525.

It is an arithmetic number, because the mean of its divisors is an integer number (1609466433120).

Almost surely, 2^{21440514132535} is an apocalyptic number.

21440514132535 is a deficient number, since it is larger than the sum of its proper divisors (4310948797385).

21440514132535 is a wasteful number, since it uses less digits than its factorization.

21440514132535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847098.

The product of its (nonzero) digits is 288000, while the sum is 40.

Adding to 21440514132535 its reverse (53523141504412), we get a palindrome (74963655636947).

The spelling of 21440514132535 in words is "twenty-one trillion, four hundred forty billion, five hundred fourteen million, one hundred thirty-two thousand, five hundred thirty-five".