21467712 has 56 divisors (see below), whose sum is σ = 64918336. Its totient is φ = 6133248.

The previous prime is 21467711. The next prime is 21467713. The reversal of 21467712 is 21776412.

It is an interprime number because it is at equal distance from previous prime (21467711) and next prime (21467713).

It is a tau number, because it is divible by the number of its divisors (56).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 21467712.

It is not an unprimeable number, because it can be changed into a prime (21467711) 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, 6643 + ... + 9330.

It is an arithmetic number, because the mean of its divisors is an integer number (1159256).

Almost surely, 2^21467712 is an apocalyptic number.

It is an amenable number.

21467712 is an abundant number, since it is smaller than the sum of its proper divisors (43450624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21467712 is a wasteful number, since it uses less digits than its factorization.

21467712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15995 (or 15985 counting only the distinct ones).

The product of its digits is 4704, while the sum is 30.

The square root of 21467712 is about 4633.3262350066. The cubic root of 21467712 is about 277.9256223224.

The spelling of 21467712 in words is "twenty-one million, four hundred sixty-seven thousand, seven hundred twelve".