21603560210 has 16 divisors (see below), whose sum is σ = 38888083800. Its totient is φ = 8641051776.

The previous prime is 21603560207. The next prime is 21603560219. The reversal of 21603560210 is 1206530612.

It can be written as a sum of positive squares in 4 ways, for example, as 11221376761 + 10382183449 = 105931^2 + 101893^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21603560210.

It is not an unprimeable number, because it can be changed into a prime (21603560219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 417446 + ... + 466334.

Almost surely, 2^21603560210 is an apocalyptic number.

21603560210 is a deficient number, since it is larger than the sum of its proper divisors (17284523590).

21603560210 is a wasteful number, since it uses less digits than its factorization.

21603560210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93085.

The product of its (nonzero) digits is 2160, while the sum is 26.

The spelling of 21603560210 in words is "twenty-one billion, six hundred three million, five hundred sixty thousand, two hundred ten".