10505020105 has 16 divisors (see below), whose sum is σ = 13451281920. Its totient is φ = 7852629888.

The previous prime is 10505020091. The next prime is 10505020109. The reversal of 10505020105 is 50102050501.

It is a cyclic number.

It is not a de Polignac number, because 10505020105 - 2¹¹ = 10505018057 is a prime.

It is a super-2 number, since 2×10505020105² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (10505020109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 750457 + ... + 764326.

It is an arithmetic number, because the mean of its divisors is an integer number (840705120).

Almost surely, 2^10505020105 is an apocalyptic number.

It is an amenable number.

10505020105 is a deficient number, since it is larger than the sum of its proper divisors (2946261815).

10505020105 is a wasteful number, since it uses less digits than its factorization.

10505020105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514880.

The product of its (nonzero) digits is 250, while the sum is 19.

Adding to 10505020105 its reverse (50102050501), we get a palindrome (60607070606).

The spelling of 10505020105 in words is "ten billion, five hundred five million, twenty thousand, one hundred five".