21314451513 has 16 divisors (see below), whose sum is σ = 28540909440. Its totient is φ = 14148857856.

The previous prime is 21314451497. The next prime is 21314451527. The reversal of 21314451513 is 31515441312.

It is not a de Polignac number, because 21314451513 - 2⁴ = 21314451497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21314451113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3332923 + ... + 3339311.

It is an arithmetic number, because the mean of its divisors is an integer number (1783806840).

Almost surely, 2^21314451513 is an apocalyptic number.

It is an amenable number.

21314451513 is a deficient number, since it is larger than the sum of its proper divisors (7226457927).

21314451513 is a wasteful number, since it uses less digits than its factorization.

21314451513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10976.

The product of its digits is 7200, while the sum is 30.

Adding to 21314451513 its reverse (31515441312), we get a palindrome (52829892825).

The spelling of 21314451513 in words is "twenty-one billion, three hundred fourteen million, four hundred fifty-one thousand, five hundred thirteen".