10142239905 has 128 divisors (see below), whose sum is σ = 21429596160. Its totient is φ = 4454714880.

The previous prime is 10142239883. The next prime is 10142239909. The reversal of 10142239905 is 50993224101.

It is not a de Polignac number, because 10142239905 - 2⁷ = 10142239777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10142239905.

It is not an unprimeable number, because it can be changed into a prime (10142239909) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2593962 + ... + 2597868.

It is an arithmetic number, because the mean of its divisors is an integer number (167418720).

Almost surely, 2^10142239905 is an apocalyptic number.

10142239905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10142239905 is an abundant number, since it is smaller than the sum of its proper divisors (11287356255).

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

10142239905 is a wasteful number, since it uses less digits than its factorization.

10142239905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4036 (or 4030 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

It can be divided in two parts, 10142 and 239905, that added together give a cube (250047 = 63³).

The spelling of 10142239905 in words is "ten billion, one hundred forty-two million, two hundred thirty-nine thousand, nine hundred five".