21342010 has 8 divisors (see below), whose sum is σ = 38415636. Its totient is φ = 8536800.

The previous prime is 21342001. The next prime is 21342023. The reversal of 21342010 is 1024312.

It can be written as a sum of positive squares in 2 ways, for example, as 19633761 + 1708249 = 4431^2 + 1307^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1067091 + ... + 1067110.

Almost surely, 2^21342010 is an apocalyptic number.

21342010 is a deficient number, since it is larger than the sum of its proper divisors (17073626).

21342010 is a wasteful number, since it uses less digits than its factorization.

21342010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134208.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 21342010 is about 4619.7413347502. The cubic root of 21342010 is about 277.3821050479.

Adding to 21342010 its reverse (1024312), we get a palindrome (22366322).

The spelling of 21342010 in words is "twenty-one million, three hundred forty-two thousand, ten".