21484371 has 4 divisors (see below), whose sum is σ = 28645832. Its totient is φ = 14322912.

The previous prime is 21484363. The next prime is 21484399. The reversal of 21484371 is 17348412.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21484371 - 2³ = 21484363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21484321) 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, 3580726 + ... + 3580731.

It is an arithmetic number, because the mean of its divisors is an integer number (7161458).

Almost surely, 2^21484371 is an apocalyptic number.

21484371 is a deficient number, since it is larger than the sum of its proper divisors (7161461).

21484371 is an equidigital number, since it uses as much as digits as its factorization.

21484371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7161460.

The product of its digits is 5376, while the sum is 30.

The square root of 21484371 is about 4635.1236229469. The cubic root of 21484371 is about 277.9974940685.

The spelling of 21484371 in words is "twenty-one million, four hundred eighty-four thousand, three hundred seventy-one".