21146010 has 16 divisors (see below), whose sum is σ = 50750496. Its totient is φ = 5638928.

The previous prime is 21145991. The next prime is 21146023. The reversal of 21146010 is 1064112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352404 + ... + 352463.

It is an arithmetic number, because the mean of its divisors is an integer number (3171906).

Almost surely, 2^21146010 is an apocalyptic number.

21146010 is an abundant number, since it is smaller than the sum of its proper divisors (29604486).

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

21146010 is a wasteful number, since it uses less digits than its factorization.

21146010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704877.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 21146010 is about 4598.4790963970. The cubic root of 21146010 is about 276.5303549412.

The spelling of 21146010 in words is "twenty-one million, one hundred forty-six thousand, ten".