21200834 has 8 divisors (see below), whose sum is σ = 32083020. Its totient is φ = 10506496.

The previous prime is 21200831. The next prime is 21200867. The reversal of 21200834 is 43800212.

It can be written as a sum of positive squares in 2 ways, for example, as 21187609 + 13225 = 4603^2 + 115^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21200831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46679 + ... + 47130.

Almost surely, 2^21200834 is an apocalyptic number.

21200834 is a deficient number, since it is larger than the sum of its proper divisors (10882186).

21200834 is a wasteful number, since it uses less digits than its factorization.

21200834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93924.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 21200834 is about 4604.4363390105. The cubic root of 21200834 is about 276.7691299648.

The spelling of 21200834 in words is "twenty-one million, two hundred thousand, eight hundred thirty-four".