20610245105 has 12 divisors (see below), whose sum is σ = 25350243996. Its totient is φ = 16086038400.

The previous prime is 20610245083. The next prime is 20610245111. The reversal of 20610245105 is 50154201602.

It can be written as a sum of positive squares in 6 ways, for example, as 1539463696 + 19070781409 = 39236^2 + 138097^2 .

It is not a de Polignac number, because 20610245105 - 2¹² = 20610241009 is a prime.

It is a super-2 number, since 2×20610245105² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1217666 + ... + 1234475.

It is an arithmetic number, because the mean of its divisors is an integer number (2112520333).

Almost surely, 2^20610245105 is an apocalyptic number.

It is an amenable number.

20610245105 is a deficient number, since it is larger than the sum of its proper divisors (4739998891).

20610245105 is an equidigital number, since it uses as much as digits as its factorization.

20610245105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2452228 (or 2452187 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 20610245105 its reverse (50154201602), we get a palindrome (70764446707).

The spelling of 20610245105 in words is "twenty billion, six hundred ten million, two hundred forty-five thousand, one hundred five".