21435150 has 72 divisors (see below), whose sum is σ = 58480632. Its totient is φ = 5192000.

The previous prime is 21435143. The next prime is 21435163. The reversal of 21435150 is 5153412.

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 35 ways as a sum of consecutive naturals, for example, 17560 + ... + 18740.

It is an arithmetic number, because the mean of its divisors is an integer number (812231).

Almost surely, 2^21435150 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21435150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29240316).

21435150 is an abundant number, since it is smaller than the sum of its proper divisors (37045482).

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

21435150 is a wasteful number, since it uses less digits than its factorization.

21435150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218 (or 1202 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 21435150 is about 4629.8110112617. The cubic root of 21435150 is about 277.7850329957.

Adding to 21435150 its reverse (5153412), we get a palindrome (26588562).

The spelling of 21435150 in words is "twenty-one million, four hundred thirty-five thousand, one hundred fifty".