21842284854 has 64 divisors (see below), whose sum is σ = 49034539008. Its totient is φ = 6440688000.

The previous prime is 21842284829. The next prime is 21842284883. The reversal of 21842284854 is 45848224812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205204 + ... + 292904.

It is an arithmetic number, because the mean of its divisors is an integer number (766164672).

Almost surely, 2^21842284854 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21842284854, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24517269504).

21842284854 is an abundant number, since it is smaller than the sum of its proper divisors (27192254154).

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

21842284854 is a wasteful number, since it uses less digits than its factorization.

21842284854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87853.

The product of its digits is 1310720, while the sum is 48.

The spelling of 21842284854 in words is "twenty-one billion, eight hundred forty-two million, two hundred eighty-four thousand, eight hundred fifty-four".