21852854 has 32 divisors (see below), whose sum is σ = 36088416. Its totient is φ = 9884160.

The previous prime is 21852851. The next prime is 21852881. The reversal of 21852854 is 45825812.

It is a happy number.

Its product of digits (25600) is a multiple of the sum of its prime divisors (320).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21852851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120644 + ... + 120824.

It is an arithmetic number, because the mean of its divisors is an integer number (1127763).

Almost surely, 2^21852854 is an apocalyptic number.

21852854 is a deficient number, since it is larger than the sum of its proper divisors (14235562).

21852854 is a wasteful number, since it uses less digits than its factorization.

21852854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320.

The product of its digits is 25600, while the sum is 35.

The square root of 21852854 is about 4674.7036269693. The cubic root of 21852854 is about 279.5778246614.

The spelling of 21852854 in words is "twenty-one million, eight hundred fifty-two thousand, eight hundred fifty-four".