21482039 has 4 divisors (see below), whose sum is σ = 22175040. Its totient is φ = 20789040.

The previous prime is 21482029. The next prime is 21482051. The reversal of 21482039 is 93028412.

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

It is a cyclic number.

It is not a de Polignac number, because 21482039 - 2¹⁶ = 21416503 is a prime.

It is a super-2 number, since 2×21482039² = 922955999195042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21482029) 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, 346454 + ... + 346515.

It is an arithmetic number, because the mean of its divisors is an integer number (5543760).

Almost surely, 2^21482039 is an apocalyptic number.

21482039 is a deficient number, since it is larger than the sum of its proper divisors (693001).

21482039 is an equidigital number, since it uses as much as digits as its factorization.

21482039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693000.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 21482039 is about 4634.8720586441. The cubic root of 21482039 is about 277.9874353827.

The spelling of 21482039 in words is "twenty-one million, four hundred eighty-two thousand, thirty-nine".