21083373 has 24 divisors (see below), whose sum is σ = 31450848. Its totient is φ = 13601952.

The previous prime is 21083371. The next prime is 21083393. The reversal of 21083373 is 37338012.

21083373 is a `hidden beast` number, since 210 + 83 + 373 = 666.

It is not a de Polignac number, because 21083373 - 2¹ = 21083371 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21083371) 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 23 ways as a sum of consecutive naturals, for example, 60586 + ... + 60932.

It is an arithmetic number, because the mean of its divisors is an integer number (1310452).

Almost surely, 2^21083373 is an apocalyptic number.

It is an amenable number.

21083373 is a deficient number, since it is larger than the sum of its proper divisors (10367475).

21083373 is a wasteful number, since it uses less digits than its factorization.

21083373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553 (or 550 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 21083373 is about 4591.6634240763. The cubic root of 21083373 is about 276.2570462908.

The spelling of 21083373 in words is "twenty-one million, eighty-three thousand, three hundred seventy-three".