21514344453 has 24 divisors (see below), whose sum is σ = 36475632128. Its totient is φ = 11961641952.

The previous prime is 21514344443. The next prime is 21514344479. The reversal of 21514344453 is 35444341512.

21514344453 is a `hidden beast` number, since 21 + 5 + 143 + 44 + 453 = 666.

It is not a de Polignac number, because 21514344453 - 2⁵ = 21514344421 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 (21514344403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4612501 + ... + 4617162.

Almost surely, 2^21514344453 is an apocalyptic number.

It is an amenable number.

21514344453 is a deficient number, since it is larger than the sum of its proper divisors (14961287675).

21514344453 is a wasteful number, since it uses less digits than its factorization.

21514344453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9229713 (or 9229710 counting only the distinct ones).

The product of its digits is 115200, while the sum is 36.

Adding to 21514344453 its reverse (35444341512), we get a palindrome (56958685965).

The spelling of 21514344453 in words is "twenty-one billion, five hundred fourteen million, three hundred forty-four thousand, four hundred fifty-three".