21301412 has 12 divisors (see below), whose sum is σ = 40666416. Its totient is φ = 9682440.

The previous prime is 21301411. The next prime is 21301421. The reversal of 21301412 is 21410312.

It is not an unprimeable number, because it can be changed into a prime (21301411) 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, 242018 + ... + 242105.

It is an arithmetic number, because the mean of its divisors is an integer number (3388868).

Almost surely, 2^21301412 is an apocalyptic number.

21301412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21301412 is a deficient number, since it is larger than the sum of its proper divisors (19365004).

21301412 is a wasteful number, since it uses less digits than its factorization.

21301412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484138 (or 484136 counting only the distinct ones).

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

The square root of 21301412 is about 4615.3452741913. The cubic root of 21301412 is about 277.2061093350.

Adding to 21301412 its reverse (21410312), we get a palindrome (42711724).

Subtracting 21301412 from its reverse (21410312), we obtain a square (108900 = 330²).

The spelling of 21301412 in words is "twenty-one million, three hundred one thousand, four hundred twelve".