21083374 has 16 divisors (see below), whose sum is σ = 34151040. Its totient is φ = 9704160.

The previous prime is 21083371. The next prime is 21083393. The reversal of 21083374 is 47338012.

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 7 ways as a sum of consecutive naturals, for example, 11107 + ... + 12865.

It is an arithmetic number, because the mean of its divisors is an integer number (2134440).

Almost surely, 2^21083374 is an apocalyptic number.

21083374 is a deficient number, since it is larger than the sum of its proper divisors (13067666).

21083374 is a wasteful number, since it uses less digits than its factorization.

21083374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2235.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 21083374 is about 4591.6635329693. The cubic root of 21083374 is about 276.2570506585.

It can be divided in two parts, 2108337 and 4, that multiplied together give a palindrome (8433348).

The spelling of 21083374 in words is "twenty-one million, eighty-three thousand, three hundred seventy-four".