21064103651610 has 24 divisors (see below), whose sum is σ = 54766669494420. Its totient is φ = 5617094307072.

The previous prime is 21064103651603. The next prime is 21064103651671. The reversal of 21064103651610 is 1615630146012.

21064103651610 is a `hidden beast` number, since 2 + 1 + 0 + 6 + 4 + 1 + 0 + 36 + 5 + 1 + 610 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21060031552641 + 4072098969 = 4589121^2 + 63813^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117022797975 + ... + 117022798154.

Almost surely, 2^{21064103651610} is an apocalyptic number.

21064103651610 is an abundant number, since it is smaller than the sum of its proper divisors (33702565842810).

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

21064103651610 is a wasteful number, since it uses less digits than its factorization.

21064103651610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234045596142 (or 234045596139 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

Adding to 21064103651610 its reverse (1615630146012), we get a palindrome (22679733797622).

The spelling of 21064103651610 in words is "twenty-one trillion, sixty-four billion, one hundred three million, six hundred fifty-one thousand, six hundred ten".