21361010 has 32 divisors (see below), whose sum is σ = 44416512. Its totient is φ = 7310080.

The previous prime is 21361003. The next prime is 21361013. The reversal of 21361010 is 1016312.

It is not an unprimeable number, because it can be changed into a prime (21361013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3842 + ... + 7581.

It is an arithmetic number, because the mean of its divisors is an integer number (1388016).

Almost surely, 2^21361010 is an apocalyptic number.

21361010 is an abundant number, since it is smaller than the sum of its proper divisors (23055502).

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

21361010 is a wasteful number, since it uses less digits than its factorization.

21361010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11458.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 21361010 is about 4621.7972694613. The cubic root of 21361010 is about 277.4643949665.

Adding to 21361010 its reverse (1016312), we get a palindrome (22377322).

The spelling of 21361010 in words is "twenty-one million, three hundred sixty-one thousand, ten".