21453030514 has 4 divisors (see below), whose sum is σ = 32179545774. Its totient is φ = 10726515256.

The previous prime is 21453030503. The next prime is 21453030523. The reversal of 21453030514 is 41503035412.

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

It can be written as a sum of positive squares in only one way, i.e., 21451996225 + 1034289 = 146465^2 + 1017^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5363257627 + ... + 5363257630.

Almost surely, 2^21453030514 is an apocalyptic number.

21453030514 is a deficient number, since it is larger than the sum of its proper divisors (10726515260).

21453030514 is a wasteful number, since it uses less digits than its factorization.

21453030514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10726515259.

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

Adding to 21453030514 its reverse (41503035412), we get a palindrome (62956065926).

The spelling of 21453030514 in words is "twenty-one billion, four hundred fifty-three million, thirty thousand, five hundred fourteen".