21050950 has 12 divisors (see below), whose sum is σ = 39154860. Its totient is φ = 8420360.

The previous prime is 21050941. The next prime is 21050963. The reversal of 21050950 is 5905012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 210460 + ... + 210559.

It is an arithmetic number, because the mean of its divisors is an integer number (3262905).

Almost surely, 2^21050950 is an apocalyptic number.

21050950 is a deficient number, since it is larger than the sum of its proper divisors (18103910).

21050950 is a wasteful number, since it uses less digits than its factorization.

21050950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421031 (or 421026 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 21050950 is about 4588.1314279345. The cubic root of 21050950 is about 276.1153599537.

Adding to 21050950 its reverse (5905012), we get a palindrome (26955962).

The spelling of 21050950 in words is "twenty-one million, fifty thousand, nine hundred fifty".