21124346 has 8 divisors (see below), whose sum is σ = 32133024. Its totient is φ = 10413340.

The previous prime is 21124343. The next prime is 21124349. The reversal of 21124346 is 64342112.

It is an interprime number because it is at equal distance from previous prime (21124343) and next prime (21124349).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21124343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74240 + ... + 74523.

It is an arithmetic number, because the mean of its divisors is an integer number (4016628).

Almost surely, 2^21124346 is an apocalyptic number.

21124346 is a deficient number, since it is larger than the sum of its proper divisors (11008678).

21124346 is a wasteful number, since it uses less digits than its factorization.

21124346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148836.

The product of its digits is 1152, while the sum is 23.

The square root of 21124346 is about 4596.1229313412. The cubic root of 21124346 is about 276.4358879376.

Adding to 21124346 its reverse (64342112), we get a palindrome (85466458).

The spelling of 21124346 in words is "twenty-one million, one hundred twenty-four thousand, three hundred forty-six".