21325010 has 16 divisors (see below), whose sum is σ = 43868736. Its totient is φ = 7311408.

The previous prime is 21324983. The next prime is 21325013. The reversal of 21325010 is 1052312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21325013) by changing a digit.

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, 152252 + ... + 152391.

It is an arithmetic number, because the mean of its divisors is an integer number (2741796).

Almost surely, 2^21325010 is an apocalyptic number.

21325010 is an abundant number, since it is smaller than the sum of its proper divisors (22543726).

21325010 is a wasteful number, since it uses less digits than its factorization.

21325010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304657.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 21325010 is about 4617.9010383506. The cubic root of 21325010 is about 277.3084358171.

Adding to 21325010 its reverse (1052312), we get a palindrome (22377322).

The spelling of 21325010 in words is "twenty-one million, three hundred twenty-five thousand, ten".