21143050 has 12 divisors (see below), whose sum is σ = 39326166. Its totient is φ = 8457200.

The previous prime is 21143039. The next prime is 21143051. The reversal of 21143050 is 5034112.

It can be written as a sum of positive squares in 3 ways, for example, as 20529961 + 613089 = 4531^2 + 783^2 .

It is not an unprimeable number, because it can be changed into a prime (21143051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 211381 + ... + 211480.

Almost surely, 2^21143050 is an apocalyptic number.

21143050 is a deficient number, since it is larger than the sum of its proper divisors (18183116).

21143050 is a wasteful number, since it uses less digits than its factorization.

21143050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422873 (or 422868 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 21143050 is about 4598.1572395907. The cubic root of 21143050 is about 276.5174515133.

Adding to 21143050 its reverse (5034112), we get a palindrome (26177162).

The spelling of 21143050 in words is "twenty-one million, one hundred forty-three thousand, fifty".