21505150235 has 8 divisors (see below), whose sum is σ = 25807156800. Its totient is φ = 17203469184.

The previous prime is 21505150217. The next prime is 21505150241. The reversal of 21505150235 is 53205150512.

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 21505150235 - 2²⁰ = 21504101659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21505150198 and 21505150207.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101219 + ... + 230771.

It is an arithmetic number, because the mean of its divisors is an integer number (3225894600).

Almost surely, 2^21505150235 is an apocalyptic number.

21505150235 is a deficient number, since it is larger than the sum of its proper divisors (4302006565).

21505150235 is a wasteful number, since it uses less digits than its factorization.

21505150235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162757.

The product of its (nonzero) digits is 7500, while the sum is 29.

The spelling of 21505150235 in words is "twenty-one billion, five hundred five million, one hundred fifty thousand, two hundred thirty-five".