21214850 has 24 divisors (see below), whose sum is σ = 40735488. Its totient is φ = 8211600.

The previous prime is 21214847. The next prime is 21214859. The reversal of 21214850 is 5841212.

It is not an unprimeable number, because it can be changed into a prime (21214859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5294 + ... + 8393.

It is an arithmetic number, because the mean of its divisors is an integer number (1697312).

Almost surely, 2^21214850 is an apocalyptic number.

21214850 is a deficient number, since it is larger than the sum of its proper divisors (19520638).

21214850 is a wasteful number, since it uses less digits than its factorization.

21214850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13730 (or 13725 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 21214850 is about 4605.9580979423. The cubic root of 21214850 is about 276.8301077795.

The spelling of 21214850 in words is "twenty-one million, two hundred fourteen thousand, eight hundred fifty".