21847012 has 24 divisors (see below), whose sum is σ = 41906592. Its totient is φ = 9883200.

The previous prime is 21846991. The next prime is 21847013. The reversal of 21847012 is 21074812.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21847013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9187 + ... + 11317.

It is an arithmetic number, because the mean of its divisors is an integer number (1746108).

Almost surely, 2^21847012 is an apocalyptic number.

21847012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21847012 is a deficient number, since it is larger than the sum of its proper divisors (20059580).

21847012 is a wasteful number, since it uses less digits than its factorization.

21847012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2379 (or 2377 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 21847012 is about 4674.0787327558. The cubic root of 21847012 is about 279.5529089346.

The spelling of 21847012 in words is "twenty-one million, eight hundred forty-seven thousand, twelve".