21052110 has 32 divisors (see below), whose sum is σ = 50817312. Its totient is φ = 5581440.

The previous prime is 21052091. The next prime is 21052111. The reversal of 21052110 is 1125012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21052111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3492 + ... + 7368.

It is an arithmetic number, because the mean of its divisors is an integer number (1588041).

Almost surely, 2^21052110 is an apocalyptic number.

21052110 is an abundant number, since it is smaller than the sum of its proper divisors (29765202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21052110 is a wasteful number, since it uses less digits than its factorization.

21052110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4068.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 21052110 is about 4588.2578393111. The cubic root of 21052110 is about 276.1204315845.

Adding to 21052110 its reverse (1125012), we get a palindrome (22177122).

The spelling of 21052110 in words is "twenty-one million, fifty-two thousand, one hundred ten".