21854150 has 12 divisors (see below), whose sum is σ = 40648812. Its totient is φ = 8741640.

The previous prime is 21854111. The next prime is 21854153. The reversal of 21854150 is 5145812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21854153) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 218492 + ... + 218591.

It is an arithmetic number, because the mean of its divisors is an integer number (3387401).

Almost surely, 2^21854150 is an apocalyptic number.

21854150 is a deficient number, since it is larger than the sum of its proper divisors (18794662).

21854150 is a wasteful number, since it uses less digits than its factorization.

21854150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437095 (or 437090 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 21854150 is about 4674.8422433276. The cubic root of 21854150 is about 279.5833514101.

Adding to 21854150 its reverse (5145812), we get a palindrome (26999962).

The spelling of 21854150 in words is "twenty-one million, eight hundred fifty-four thousand, one hundred fifty".