21354250333 has 16 divisors (see below), whose sum is σ = 23306088960. Its totient is φ = 19447553664.

The previous prime is 21354250303. The next prime is 21354250349. The reversal of 21354250333 is 33305245312.

It is a cyclic number.

It is not a de Polignac number, because 21354250333 - 2⁵ = 21354250301 is a prime.

It is a super-2 number, since 2×21354250333² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21354250295 and 21354250304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21354250303) 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, 515760 + ... + 555622.

It is an arithmetic number, because the mean of its divisors is an integer number (1456630560).

Almost surely, 2^21354250333 is an apocalyptic number.

It is an amenable number.

21354250333 is a deficient number, since it is larger than the sum of its proper divisors (1951838627).

21354250333 is a wasteful number, since it uses less digits than its factorization.

21354250333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40428.

The product of its (nonzero) digits is 32400, while the sum is 31.

Adding to 21354250333 its reverse (33305245312), we get a palindrome (54659495645).

The spelling of 21354250333 in words is "twenty-one billion, three hundred fifty-four million, two hundred fifty thousand, three hundred thirty-three".