20115105234 has 32 divisors (see below), whose sum is σ = 46004703360. Its totient is φ = 5743757952.

The previous prime is 20115105229. The next prime is 20115105259. The reversal of 20115105234 is 43250151102.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70339 + ... + 212550.

It is an arithmetic number, because the mean of its divisors is an integer number (1437646980).

Almost surely, 2^20115105234 is an apocalyptic number.

20115105234 is an abundant number, since it is smaller than the sum of its proper divisors (25889598126).

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

20115105234 is a wasteful number, since it uses less digits than its factorization.

20115105234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284594.

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 20115105234 its reverse (43250151102), we get a palindrome (63365256336).

The spelling of 20115105234 in words is "twenty billion, one hundred fifteen million, one hundred five thousand, two hundred thirty-four".