21124310 has 16 divisors (see below), whose sum is σ = 38220336. Its totient is φ = 8406048.

The previous prime is 21124289. The next prime is 21124321. The reversal of 21124310 is 1342112.

It is a super-2 number, since 2×21124310² = 892472945952200, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 3392 + ... + 7331.

It is an arithmetic number, because the mean of its divisors is an integer number (2388771).

Almost surely, 2^21124310 is an apocalyptic number.

21124310 is a deficient number, since it is larger than the sum of its proper divisors (17096026).

21124310 is a wasteful number, since it uses less digits than its factorization.

21124310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10927.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 21124310 is about 4596.1190149952. The cubic root of 21124310 is about 276.4357309039.

Adding to 21124310 its reverse (1342112), we get a palindrome (22466422).

The spelling of 21124310 in words is "twenty-one million, one hundred twenty-four thousand, three hundred ten".