21467472 has 40 divisors (see below), whose sum is σ = 59725344. Its totient is φ = 6605184.

The previous prime is 21467471. The next prime is 21467483. The reversal of 21467472 is 27476412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21467471) 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, 16578 + ... + 17825.

Almost surely, 2^21467472 is an apocalyptic number.

It is an amenable number.

21467472 is an abundant number, since it is smaller than the sum of its proper divisors (38257872).

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

21467472 is a wasteful number, since it uses less digits than its factorization.

21467472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34427 (or 34421 counting only the distinct ones).

The product of its digits is 18816, while the sum is 33.

The square root of 21467472 is about 4633.3003356139. The cubic root of 21467472 is about 277.9245866213.

The spelling of 21467472 in words is "twenty-one million, four hundred sixty-seven thousand, four hundred seventy-two".