21054214233 has 24 divisors (see below), whose sum is σ = 33287912840. Its totient is φ = 12744034560.

The previous prime is 21054214187. The next prime is 21054214289. The reversal of 21054214233 is 33241245012.

21054214233 is a `hidden beast` number, since 2 + 1 + 0 + 5 + 421 + 4 + 233 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1321831449 + 19732382784 = 36357^2 + 140472^2 .

It is not a de Polignac number, because 21054214233 - 2⁹ = 21054213721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21054214197 and 21054214206.

It is not an unprimeable number, because it can be changed into a prime (21054214633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1467868 + ... + 1482141.

Almost surely, 2^21054214233 is an apocalyptic number.

It is an amenable number.

21054214233 is a deficient number, since it is larger than the sum of its proper divisors (12233698607).

21054214233 is a wasteful number, since it uses less digits than its factorization.

21054214233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2950089 (or 2950086 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 21054214233 its reverse (33241245012), we get a palindrome (54295459245).

The spelling of 21054214233 in words is "twenty-one billion, fifty-four million, two hundred fourteen thousand, two hundred thirty-three".