21038106 has 8 divisors (see below), whose sum is σ = 42076224. Its totient is φ = 7012700.

The previous prime is 21038071. The next prime is 21038117. The reversal of 21038106 is 60183012.

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

21038106 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1753170 + ... + 1753181.

It is an arithmetic number, because the mean of its divisors is an integer number (5259528).

Almost surely, 2^21038106 is an apocalyptic number.

21038106 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21038106 is a wasteful number, since it uses less digits than its factorization.

21038106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3506356.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 21038106 is about 4586.7315160144. The cubic root of 21038106 is about 276.0591923034.

The spelling of 21038106 in words is "twenty-one million, thirty-eight thousand, one hundred six".