21202150 has 24 divisors (see below), whose sum is σ = 40030920. Its totient is φ = 8352960.

The previous prime is 21202141. The next prime is 21202177. The reversal of 21202150 is 5120212.

It is a self number, because there is not a number n which added to its sum of digits gives 21202150.

It is a congruent number.

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, 186 + ... + 6514.

It is an arithmetic number, because the mean of its divisors is an integer number (1667955).

Almost surely, 2^21202150 is an apocalyptic number.

21202150 is a deficient number, since it is larger than the sum of its proper divisors (18828770).

21202150 is a wasteful number, since it uses less digits than its factorization.

21202150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6408 (or 6403 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 21202150 is about 4604.5792424498. The cubic root of 21202150 is about 276.7748564791.

Adding to 21202150 its reverse (5120212), we get a palindrome (26322362).

The spelling of 21202150 in words is "twenty-one million, two hundred two thousand, one hundred fifty".