21895017829234 has 16 divisors (see below), whose sum is σ = 35861915839680. Its totient is φ = 9942918374160.

The previous prime is 21895017829213. The next prime is 21895017829241. The reversal of 21895017829234 is 43292871059812.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 468098949 + ... + 468145720.

It is an arithmetic number, because the mean of its divisors is an integer number (2241369739980).

Almost surely, 2^{21895017829234} is an apocalyptic number.

21895017829234 is a deficient number, since it is larger than the sum of its proper divisors (13966898010446).

21895017829234 is a wasteful number, since it uses less digits than its factorization.

21895017829234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936245745.

The product of its (nonzero) digits is 17418240, while the sum is 61.

The spelling of 21895017829234 in words is "twenty-one trillion, eight hundred ninety-five billion, seventeen million, eight hundred twenty-nine thousand, two hundred thirty-four".