21103240610 has 8 divisors (see below), whose sum is σ = 37985833116. Its totient is φ = 8441296240.

The previous prime is 21103240601. The next prime is 21103240619. The reversal of 21103240610 is 1604230112.

It is an interprime number because it is at equal distance from previous prime (21103240601) and next prime (21103240619).

It can be written as a sum of positive squares in 2 ways, for example, as 20822778601 + 280462009 = 144301^2 + 16747^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21103240619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055162021 + ... + 1055162040.

Almost surely, 2^21103240610 is an apocalyptic number.

21103240610 is a deficient number, since it is larger than the sum of its proper divisors (16882592506).

21103240610 is a wasteful number, since it uses less digits than its factorization.

21103240610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2110324068.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21103240610 its reverse (1604230112), we get a palindrome (22707470722).

The spelling of 21103240610 in words is "twenty-one billion, one hundred three million, two hundred forty thousand, six hundred ten".