21874150 has 36 divisors (see below), whose sum is σ = 42583212. Its totient is φ = 8359120.

The previous prime is 21874147. The next prime is 21874157. The reversal of 21874150 is 5147812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21874157) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 26037 + ... + 26863.

It is an arithmetic number, because the mean of its divisors is an integer number (1182867).

Almost surely, 2^21874150 is an apocalyptic number.

21874150 is a deficient number, since it is larger than the sum of its proper divisors (20709062).

21874150 is a wasteful number, since it uses less digits than its factorization.

21874150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885 (or 857 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 21874150 is about 4676.9808637624. The cubic root of 21874150 is about 279.6686130521.

It can be divided in two parts, 218741 and 50, that added together give a triangular number (218791 = T₆₆₁).

The spelling of 21874150 in words is "twenty-one million, eight hundred seventy-four thousand, one hundred fifty".