21895273152 has 84 divisors (see below), whose sum is σ = 62816878176. Its totient is φ = 7291676160.

The previous prime is 21895273139. The next prime is 21895273163. The reversal of 21895273152 is 25137259812.

It is a junction number, because it is equal to n+sod(n) for n = 21895273098 and 21895273107.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 626377 + ... + 660407.

Almost surely, 2^21895273152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21895273152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31408439088).

21895273152 is an abundant number, since it is smaller than the sum of its proper divisors (40921605024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21895273152 is a wasteful number, since it uses less digits than its factorization.

21895273152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35166 (or 35153 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The spelling of 21895273152 in words is "twenty-one billion, eight hundred ninety-five million, two hundred seventy-three thousand, one hundred fifty-two".