21141850 has 24 divisors (see below), whose sum is σ = 39917088. Its totient is φ = 8329200.

The previous prime is 21141833. The next prime is 21141871. The reversal of 21141850 is 5814112.

It is an unprimeable number.

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, 195 + ... + 6505.

It is an arithmetic number, because the mean of its divisors is an integer number (1663212).

Almost surely, 2^21141850 is an apocalyptic number.

21141850 is a deficient number, since it is larger than the sum of its proper divisors (18775238).

21141850 is a wasteful number, since it uses less digits than its factorization.

21141850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6390 (or 6385 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 22.

The square root of 21141850 is about 4598.0267506834. The cubic root of 21141850 is about 276.5122200508.

Adding to 21141850 its reverse (5814112), we get a palindrome (26955962).

The spelling of 21141850 in words is "twenty-one million, one hundred forty-one thousand, eight hundred fifty".