21074211 has 24 divisors (see below), whose sum is σ = 32235840. Its totient is φ = 13230000.

The previous prime is 21074197. The next prime is 21074227. The reversal of 21074211 is 11247012.

It is not a de Polignac number, because 21074211 - 2⁶ = 21074147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21074111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42676 + ... + 43166.

It is an arithmetic number, because the mean of its divisors is an integer number (1343160).

Almost surely, 2^21074211 is an apocalyptic number.

21074211 is a deficient number, since it is larger than the sum of its proper divisors (11161629).

21074211 is a wasteful number, since it uses less digits than its factorization.

21074211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767 (or 764 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 21074211 is about 4590.6656380094. The cubic root of 21074211 is about 276.2170236976.

The spelling of 21074211 in words is "twenty-one million, seventy-four thousand, two hundred eleven".