21052034 has 8 divisors (see below), whose sum is σ = 31599180. Its totient is φ = 10518976.

The previous prime is 21051991. The next prime is 21052039. The reversal of 21052034 is 43025012.

It can be written as a sum of positive squares in 2 ways, for example, as 20566225 + 485809 = 4535^2 + 697^2 .

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 (21052039) 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, 1862 + ... + 6750.

Almost surely, 2^21052034 is an apocalyptic number.

21052034 is a deficient number, since it is larger than the sum of its proper divisors (10547146).

21052034 is a wasteful number, since it uses less digits than its factorization.

21052034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7044.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 21052034 is about 4588.2495572931. The cubic root of 21052034 is about 276.1200993109.

Adding to 21052034 its reverse (43025012), we get a palindrome (64077046).

The spelling of 21052034 in words is "twenty-one million, fifty-two thousand, thirty-four".