20005111510234 has 4 divisors (see below), whose sum is σ = 30007667265354. Its totient is φ = 10002555755116.

The previous prime is 20005111510147. The next prime is 20005111510259. The reversal of 20005111510234 is 43201511150002.

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., 12828954553009 + 7176156957225 = 3581753^2 + 2678835^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20005111510199 and 20005111510208.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5001277877557 + ... + 5001277877560.

Almost surely, 2^{20005111510234} is an apocalyptic number.

20005111510234 is a deficient number, since it is larger than the sum of its proper divisors (10002555755120).

20005111510234 is a wasteful number, since it uses less digits than its factorization.

20005111510234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10002555755119.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 20005111510234 its reverse (43201511150002), we get a palindrome (63206622660236).

The spelling of 20005111510234 in words is "twenty trillion, five billion, one hundred eleven million, five hundred ten thousand, two hundred thirty-four".