21310412 has 12 divisors (see below), whose sum is σ = 37394280. Its totient is φ = 10626336.

The previous prime is 21310337. The next prime is 21310417. The reversal of 21310412 is 21401312.

It is a super-3 number, since 3×21310412³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21310417) 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, 5513 + ... + 8544.

It is an arithmetic number, because the mean of its divisors is an integer number (3116190).

Almost surely, 2^21310412 is an apocalyptic number.

It is an amenable number.

21310412 is a deficient number, since it is larger than the sum of its proper divisors (16083868).

21310412 is a wasteful number, since it uses less digits than its factorization.

21310412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14440 (or 14438 counting only the distinct ones).

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

The square root of 21310412 is about 4616.3201795369. The cubic root of 21310412 is about 277.2451443639.

Adding to 21310412 its reverse (21401312), we get a palindrome (42711724).

The spelling of 21310412 in words is "twenty-one million, three hundred ten thousand, four hundred twelve".