21530770602610 has 16 divisors (see below), whose sum is σ = 38774010566232. Its totient is φ = 8608169689600.

The previous prime is 21530770602589. The next prime is 21530770602613. The reversal of 21530770602610 is 1620607703512.

It can be written as a sum of positive squares in 4 ways, for example, as 10135480875129 + 11395289727481 = 3183627^2 + 3375691^2 .

It is not an unprimeable number, because it can be changed into a prime (21530770602613) 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, 517297081 + ... + 517338700.

Almost surely, 2^{21530770602610} is an apocalyptic number.

21530770602610 is a deficient number, since it is larger than the sum of its proper divisors (17243239963622).

21530770602610 is a wasteful number, since it uses less digits than its factorization.

21530770602610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034637869.

The product of its (nonzero) digits is 105840, while the sum is 40.

The spelling of 21530770602610 in words is "twenty-one trillion, five hundred thirty billion, seven hundred seventy million, six hundred two thousand, six hundred ten".