21314503521 has 6 divisors (see below), whose sum is σ = 30787616210. Its totient is φ = 14209669008.

The previous prime is 21314503519. The next prime is 21314503541. The reversal of 21314503521 is 12530541312.

21314503521 is a `hidden beast` number, since 2 + 131 + 4 + 5 + 0 + 3 + 521 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20210602896 + 1103900625 = 142164^2 + 33225^2 .

It is not a de Polignac number, because 21314503521 - 2¹ = 21314503519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21314503541) 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 5 ways as a sum of consecutive naturals, for example, 1184139076 + ... + 1184139093.

Almost surely, 2^21314503521 is an apocalyptic number.

It is an amenable number.

21314503521 is a deficient number, since it is larger than the sum of its proper divisors (9473112689).

21314503521 is a wasteful number, since it uses less digits than its factorization.

21314503521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2368278175 (or 2368278172 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The spelling of 21314503521 in words is "twenty-one billion, three hundred fourteen million, five hundred three thousand, five hundred twenty-one".