21528834153 has 8 divisors (see below), whose sum is σ = 30393648288. Its totient is φ = 13508288064.

The previous prime is 21528834143. The next prime is 21528834179. The reversal of 21528834153 is 35143882512.

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

It is not a de Polignac number, because 21528834153 - 2⁴ = 21528834137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21528834113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211066951 + ... + 211067052.

It is an arithmetic number, because the mean of its divisors is an integer number (3799206036).

Almost surely, 2^21528834153 is an apocalyptic number.

It is an amenable number.

21528834153 is a deficient number, since it is larger than the sum of its proper divisors (8864814135).

21528834153 is a wasteful number, since it uses less digits than its factorization.

21528834153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422134023.

The product of its digits is 230400, while the sum is 42.

The spelling of 21528834153 in words is "twenty-one billion, five hundred twenty-eight million, eight hundred thirty-four thousand, one hundred fifty-three".