21196850 has 24 divisors (see below), whose sum is σ = 40347120. Its totient is φ = 8280720.

The previous prime is 21196843. The next prime is 21196853. The reversal of 21196850 is 5869112.

It is not an unprimeable number, because it can be changed into a prime (21196853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2780 + ... + 7079.

It is an arithmetic number, because the mean of its divisors is an integer number (1681130).

Almost surely, 2^21196850 is an apocalyptic number.

21196850 is a deficient number, since it is larger than the sum of its proper divisors (19150270).

21196850 is a wasteful number, since it uses less digits than its factorization.

21196850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9914 (or 9909 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 21196850 is about 4604.0036924399. The cubic root of 21196850 is about 276.7517923246.

The spelling of 21196850 in words is "twenty-one million, one hundred ninety-six thousand, eight hundred fifty".