21182950 has 24 divisors (see below), whose sum is σ = 39528720. Its totient is φ = 8445600.

The previous prime is 21182939. The next prime is 21182971. The reversal of 21182950 is 5928112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22591 + ... + 23509.

It is an arithmetic number, because the mean of its divisors is an integer number (1647030).

Almost surely, 2^21182950 is an apocalyptic number.

21182950 is a deficient number, since it is larger than the sum of its proper divisors (18345770).

21182950 is a wasteful number, since it uses less digits than its factorization.

21182950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392 (or 1387 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 21182950 is about 4602.4938891866. The cubic root of 21182950 is about 276.6912850466.

The spelling of 21182950 in words is "twenty-one million, one hundred eighty-two thousand, nine hundred fifty".