21447112 has 32 divisors (see below), whose sum is σ = 41515200. Its totient is φ = 10382400.

The previous prime is 21447091. The next prime is 21447119. The reversal of 21447112 is 21174412.

It is a super-2 number, since 2×21447112² = 919957226281088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21447119) 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, 34339 + ... + 34957.

It is an arithmetic number, because the mean of its divisors is an integer number (1297350).

Almost surely, 2^21447112 is an apocalyptic number.

It is an amenable number.

21447112 is a deficient number, since it is larger than the sum of its proper divisors (20068088).

21447112 is a wasteful number, since it uses less digits than its factorization.

21447112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757 (or 753 counting only the distinct ones).

The product of its digits is 448, while the sum is 22.

The square root of 21447112 is about 4631.1026764692. The cubic root of 21447112 is about 277.8366965272.

The spelling of 21447112 in words is "twenty-one million, four hundred forty-seven thousand, one hundred twelve".