21124614 has 32 divisors (see below), whose sum is σ = 48508416. Its totient is φ = 6007680.

The previous prime is 21124601. The next prime is 21124619. The reversal of 21124614 is 41642112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21124619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9079 + ... + 11165.

It is an arithmetic number, because the mean of its divisors is an integer number (1515888).

Almost surely, 2^21124614 is an apocalyptic number.

21124614 is an abundant number, since it is smaller than the sum of its proper divisors (27383802).

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

21124614 is a wasteful number, since it uses less digits than its factorization.

21124614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2340.

The product of its digits is 384, while the sum is 21.

The square root of 21124614 is about 4596.1520862565. The cubic root of 21124614 is about 276.4370569600.

Adding to 21124614 its reverse (41642112), we get a palindrome (62766726).

The spelling of 21124614 in words is "twenty-one million, one hundred twenty-four thousand, six hundred fourteen".