21254414003 has 4 divisors (see below), whose sum is σ = 21254784288. Its totient is φ = 21254043720.

The previous prime is 21254413993. The next prime is 21254414047. The reversal of 21254414003 is 30041445212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21254414003 is a prime.

It is a super-2 number, since 2×21254414003² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21254414303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78608 + ... + 220653.

It is an arithmetic number, because the mean of its divisors is an integer number (5313696072).

Almost surely, 2^21254414003 is an apocalyptic number.

21254414003 is a deficient number, since it is larger than the sum of its proper divisors (370285).

21254414003 is an equidigital number, since it uses as much as digits as its factorization.

21254414003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370284.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 21254414003 its reverse (30041445212), we get a palindrome (51295859215).

The spelling of 21254414003 in words is "twenty-one billion, two hundred fifty-four million, four hundred fourteen thousand, three".