21024150 has 48 divisors (see below), whose sum is σ = 59591424. Its totient is φ = 4805280.

The previous prime is 21024137. The next prime is 21024173. The reversal of 21024150 is 5142012.

It is a Harshad number since it is a multiple of its sum of digits (15).

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 23 ways as a sum of consecutive naturals, for example, 8962 + ... + 11061.

It is an arithmetic number, because the mean of its divisors is an integer number (1241488).

Almost surely, 2^21024150 is an apocalyptic number.

21024150 is an abundant number, since it is smaller than the sum of its proper divisors (38567274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21024150 is a wasteful number, since it uses less digits than its factorization.

21024150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20045 (or 20040 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 21024150 is about 4585.2099188587. The cubic root of 21024150 is about 275.9981358832.

Adding to 21024150 its reverse (5142012), we get a palindrome (26166162).

The spelling of 21024150 in words is "twenty-one million, twenty-four thousand, one hundred fifty".