20105340015 has 16 divisors (see below), whose sum is σ = 32293719648. Its totient is φ = 10681122816.

The previous prime is 20105340007. The next prime is 20105340043. The reversal of 20105340015 is 51004350102.

It is not a de Polignac number, because 20105340015 - 2³ = 20105340007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20105339973 and 20105340000.

It is a congruent 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, 2603842 + ... + 2611551.

It is an arithmetic number, because the mean of its divisors is an integer number (2018357478).

Almost surely, 2^20105340015 is an apocalyptic number.

20105340015 is a deficient number, since it is larger than the sum of its proper divisors (12188379633).

20105340015 is a wasteful number, since it uses less digits than its factorization.

20105340015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5215658.

The product of its (nonzero) digits is 600, while the sum is 21.

Adding to 20105340015 its reverse (51004350102), we get a palindrome (71109690117).

The spelling of 20105340015 in words is "twenty billion, one hundred five million, three hundred forty thousand, fifteen".