21049323 has 8 divisors (see below), whose sum is σ = 28484928. Its totient is φ = 13823304.

The previous prime is 21049319. The next prime is 21049333. The reversal of 21049323 is 32394012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21049323 - 2² = 21049319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21049293 and 21049302.

It is not an unprimeable number, because it can be changed into a prime (21049333) 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, 52161 + ... + 52562.

It is an arithmetic number, because the mean of its divisors is an integer number (3560616).

Almost surely, 2^21049323 is an apocalyptic number.

21049323 is a deficient number, since it is larger than the sum of its proper divisors (7435605).

21049323 is a wasteful number, since it uses less digits than its factorization.

21049323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104793.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 21049323 is about 4587.9541192126. The cubic root of 21049323 is about 276.1082462405.

The spelling of 21049323 in words is "twenty-one million, forty-nine thousand, three hundred twenty-three".