21063124 has 24 divisors (see below), whose sum is σ = 38646720. Its totient is φ = 10025664.

The previous prime is 21063121. The next prime is 21063131. The reversal of 21063124 is 42136012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21063121) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 25632 + ... + 26440.

It is an arithmetic number, because the mean of its divisors is an integer number (1610280).

Almost surely, 2^21063124 is an apocalyptic number.

It is an amenable number.

21063124 is a deficient number, since it is larger than the sum of its proper divisors (17583596).

21063124 is a wasteful number, since it uses less digits than its factorization.

21063124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119 (or 1117 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 21063124 is about 4589.4579200598. The cubic root of 21063124 is about 276.1685765642.

Adding to 21063124 its reverse (42136012), we get a palindrome (63199136).

It can be divided in two parts, 2106312 and 4, that multiplied together give a palindrome (8425248).

The spelling of 21063124 in words is "twenty-one million, sixty-three thousand, one hundred twenty-four".