21199383 has 12 divisors (see below), whose sum is σ = 32233240. Its totient is φ = 13388976.

The previous prime is 21199369. The next prime is 21199411. The reversal of 21199383 is 38399112.

It is not a de Polignac number, because 21199383 - 2¹⁴ = 21182999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21199363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61816 + ... + 62157.

Almost surely, 2^21199383 is an apocalyptic number.

21199383 is a deficient number, since it is larger than the sum of its proper divisors (11033857).

21199383 is a wasteful number, since it uses less digits than its factorization.

21199383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123998 (or 123995 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 21199383 is about 4604.2787708826. The cubic root of 21199383 is about 276.7628157294.

The spelling of 21199383 in words is "twenty-one million, one hundred ninety-nine thousand, three hundred eighty-three".