21145010 has 16 divisors (see below), whose sum is σ = 38707200. Its totient is φ = 8314416.

The previous prime is 21145001. The next prime is 21145049. The reversal of 21145010 is 1054112.

It is a super-2 number, since 2×21145010² = 894222895800200, which contains 22 as substring.

It is a Curzon number.

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, 17330 + ... + 18509.

It is an arithmetic number, because the mean of its divisors is an integer number (2419200).

Almost surely, 2^21145010 is an apocalyptic number.

21145010 is a deficient number, since it is larger than the sum of its proper divisors (17562190).

21145010 is a wasteful number, since it uses less digits than its factorization.

21145010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35905.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 21145010 is about 4598.3703635092. The cubic root of 21145010 is about 276.5259958097.

Adding to 21145010 its reverse (1054112), we get a palindrome (22199122).

The spelling of 21145010 in words is "twenty-one million, one hundred forty-five thousand, ten".