21852150 has 24 divisors (see below), whose sum is σ = 54193704. Its totient is φ = 5827200.

The previous prime is 21852143. The next prime is 21852151. The reversal of 21852150 is 5125812.

It is a self number, because there is not a number n which added to its sum of digits gives 21852150.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21852151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72691 + ... + 72990.

It is an arithmetic number, because the mean of its divisors is an integer number (2258071).

Almost surely, 2^21852150 is an apocalyptic number.

21852150 is an abundant number, since it is smaller than the sum of its proper divisors (32341554).

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

21852150 is a wasteful number, since it uses less digits than its factorization.

21852150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145696 (or 145691 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 21852150 is about 4674.6283274716. The cubic root of 21852150 is about 279.5748223853.

Adding to 21852150 its reverse (5125812), we get a palindrome (26977962).

The spelling of 21852150 in words is "twenty-one million, eight hundred fifty-two thousand, one hundred fifty".