21045153343 has 8 divisors (see below), whose sum is σ = 21563332560. Its totient is φ = 20527206720.

The previous prime is 21045153329. The next prime is 21045153361. The reversal of 21045153343 is 34335154012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21045153343 - 2⁹ = 21045152831 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 (21045153443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132648 + ... + 244306.

It is an arithmetic number, because the mean of its divisors is an integer number (2695416570).

Almost surely, 2^21045153343 is an apocalyptic number.

21045153343 is a deficient number, since it is larger than the sum of its proper divisors (518179217).

21045153343 is a wasteful number, since it uses less digits than its factorization.

21045153343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116297.

The product of its (nonzero) digits is 21600, while the sum is 31.

The spelling of 21045153343 in words is "twenty-one billion, forty-five million, one hundred fifty-three thousand, three hundred forty-three".