21095153353 has 4 divisors (see below), whose sum is σ = 21288686980. Its totient is φ = 20901619728.

The previous prime is 21095153329. The next prime is 21095153377. The reversal of 21095153353 is 35335159012.

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

It is an interprime number because it is at equal distance from previous prime (21095153329) and next prime (21095153377).

It can be written as a sum of positive squares in 2 ways, for example, as 9164615824 + 11930537529 = 95732^2 + 109227^2 .

It is a cyclic number.

It is not a de Polignac number, because 21095153353 - 2¹⁷ = 21095022281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21095153393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96766650 + ... + 96766867.

It is an arithmetic number, because the mean of its divisors is an integer number (5322171745).

Almost surely, 2^21095153353 is an apocalyptic number.

It is an amenable number.

21095153353 is a deficient number, since it is larger than the sum of its proper divisors (193533627).

21095153353 is a wasteful number, since it uses less digits than its factorization.

21095153353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193533626.

The product of its (nonzero) digits is 60750, while the sum is 37.

The spelling of 21095153353 in words is "twenty-one billion, ninety-five million, one hundred fifty-three thousand, three hundred fifty-three".