21484383 has 32 divisors (see below), whose sum is σ = 31664640. Its totient is φ = 12908160.

The previous prime is 21484363. The next prime is 21484399. The reversal of 21484383 is 38348412.

It is not a de Polignac number, because 21484383 - 2¹⁶ = 21418847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21484303) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128566 + ... + 128732.

It is an arithmetic number, because the mean of its divisors is an integer number (989520).

Almost surely, 2^21484383 is an apocalyptic number.

21484383 is a deficient number, since it is larger than the sum of its proper divisors (10180257).

21484383 is a wasteful number, since it uses less digits than its factorization.

21484383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287.

The product of its digits is 18432, while the sum is 33.

The square root of 21484383 is about 4635.1249174105. The cubic root of 21484383 is about 277.9975458265.

The spelling of 21484383 in words is "twenty-one million, four hundred eighty-four thousand, three hundred eighty-three".