21043150 has 24 divisors (see below), whose sum is σ = 39309984. Its totient is φ = 8380800.

The previous prime is 21043133. The next prime is 21043153. The reversal of 21043150 is 5134012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21043153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12774 + ... + 14326.

It is an arithmetic number, because the mean of its divisors is an integer number (1637916).

Almost surely, 2^21043150 is an apocalyptic number.

21043150 is a deficient number, since it is larger than the sum of its proper divisors (18266834).

21043150 is a wasteful number, since it uses less digits than its factorization.

21043150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1836 (or 1831 counting only the distinct ones).

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

The square root of 21043150 is about 4587.2813299382. The cubic root of 21043150 is about 276.0812527699.

Adding to 21043150 its reverse (5134012), we get a palindrome (26177162).

The spelling of 21043150 in words is "twenty-one million, forty-three thousand, one hundred fifty".