21453514351 has 4 divisors (see below), whose sum is σ = 21456343672. Its totient is φ = 21450685032.

The previous prime is 21453514349. The next prime is 21453514399. The reversal of 21453514351 is 15341535412.

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

It is a cyclic number.

It is not a de Polignac number, because 21453514351 - 2¹ = 21453514349 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 (21453514301) 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, 1403256 + ... + 1418461.

It is an arithmetic number, because the mean of its divisors is an integer number (5364085918).

Almost surely, 2^21453514351 is an apocalyptic number.

21453514351 is a deficient number, since it is larger than the sum of its proper divisors (2829321).

21453514351 is an equidigital number, since it uses as much as digits as its factorization.

21453514351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2829320.

The product of its digits is 36000, while the sum is 34.

The spelling of 21453514351 in words is "twenty-one billion, four hundred fifty-three million, five hundred fourteen thousand, three hundred fifty-one".