21423312333009 has 24 divisors (see below), whose sum is σ = 30974513073192. Its totient is φ = 14268493674240.

The previous prime is 21423312332993. The next prime is 21423312333029. The reversal of 21423312333009 is 90033321332412.

21423312333009 is a `hidden beast` number, since 2 + 1 + 4 + 2 + 3 + 312 + 3 + 330 + 0 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 6193767057984 + 15229545275025 = 2488728^2 + 3902505^2 .

It is not a de Polignac number, because 21423312333009 - 2⁴ = 21423312332993 is a prime.

It is a super-2 number, since 2×21423312333009² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21423312333029) 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, 40617709 + ... + 41141765.

It is an arithmetic number, because the mean of its divisors is an integer number (1290604711383).

Almost surely, 2^{21423312333009} is an apocalyptic number.

It is an amenable number.

21423312333009 is a deficient number, since it is larger than the sum of its proper divisors (9551200740183).

21423312333009 is a wasteful number, since it uses less digits than its factorization.

21423312333009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528417 (or 528414 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 36.

The spelling of 21423312333009 in words is "twenty-one trillion, four hundred twenty-three billion, three hundred twelve million, three hundred thirty-three thousand, nine".