21454051303 has 4 divisors (see below), whose sum is σ = 21454421368. Its totient is φ = 21453681240.

The previous prime is 21454051277. The next prime is 21454051337. The reversal of 21454051303 is 30315045412.

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-21454051303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21454058303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77076 + ... + 221017.

It is an arithmetic number, because the mean of its divisors is an integer number (5363605342).

Almost surely, 2^21454051303 is an apocalyptic number.

21454051303 is a deficient number, since it is larger than the sum of its proper divisors (370065).

21454051303 is an equidigital number, since it uses as much as digits as its factorization.

21454051303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370064.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 21454051303 its reverse (30315045412), we get a palindrome (51769096715).

The spelling of 21454051303 in words is "twenty-one billion, four hundred fifty-four million, fifty-one thousand, three hundred three".