21333214513 has 24 divisors (see below), whose sum is σ = 23498670888. Its totient is φ = 19252117248.

The previous prime is 21333214499. The next prime is 21333214543. The reversal of 21333214513 is 31541233312.

It can be written as a sum of positive squares in 4 ways, for example, as 828979264 + 20504235249 = 28792^2 + 143193^2 .

It is not a de Polignac number, because 21333214513 - 2²¹ = 21331117361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21333214543) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8913645 + ... + 8916037.

It is an arithmetic number, because the mean of its divisors is an integer number (979111287).

Almost surely, 2^21333214513 is an apocalyptic number.

It is an amenable number.

21333214513 is a deficient number, since it is larger than the sum of its proper divisors (2165456375).

21333214513 is a wasteful number, since it uses less digits than its factorization.

21333214513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2721 (or 2662 counting only the distinct ones).

The product of its digits is 6480, while the sum is 28.

Adding to 21333214513 its reverse (31541233312), we get a palindrome (52874447825).

The spelling of 21333214513 in words is "twenty-one billion, three hundred thirty-three million, two hundred fourteen thousand, five hundred thirteen".