105240420634 has 4 divisors (see below), whose sum is σ = 157860630954. Its totient is φ = 52620210316.

The previous prime is 105240420629. The next prime is 105240420679. The reversal of 105240420634 is 436024042501.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 63561973225 + 41678447409 = 252115^2 + 204153^2 .

It is a super-2 number, since 2×105240420634² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 105240420596 and 105240420605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26310105157 + ... + 26310105160.

Almost surely, 2^105240420634 is an apocalyptic number.

105240420634 is a deficient number, since it is larger than the sum of its proper divisors (52620210320).

105240420634 is an equidigital number, since it uses as much as digits as its factorization.

105240420634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52620210319.

The product of its (nonzero) digits is 23040, while the sum is 31.

The spelling of 105240420634 in words is "one hundred five billion, two hundred forty million, four hundred twenty thousand, six hundred thirty-four".