21140525140405 has 48 divisors (see below), whose sum is σ = 27960057506304. Its totient is φ = 15333318000000.

The previous prime is 21140525140313. The next prime is 21140525140439. The reversal of 21140525140405 is 50404152504112.

It is not a de Polignac number, because 21140525140405 - 2²¹ = 21140523043253 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 544124230 + ... + 544163080.

It is an arithmetic number, because the mean of its divisors is an integer number (582501198048).

Almost surely, 2^{21140525140405} is an apocalyptic number.

It is an amenable number.

21140525140405 is a deficient number, since it is larger than the sum of its proper divisors (6819532365899).

21140525140405 is a wasteful number, since it uses less digits than its factorization.

21140525140405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41290 (or 41279 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 34.

Adding to 21140525140405 its reverse (50404152504112), we get a palindrome (71544677644517).

The spelling of 21140525140405 in words is "twenty-one trillion, one hundred forty billion, five hundred twenty-five million, one hundred forty thousand, four hundred five".