20113515111 has 16 divisors (see below), whose sum is σ = 27995235840. Its totient is φ = 12820869600.

The previous prime is 20113515101. The next prime is 20113515119. The reversal of 20113515111 is 11151531102.

It is not a de Polignac number, because 20113515111 - 2⁹ = 20113514599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113515119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118885 + ... + 233153.

It is an arithmetic number, because the mean of its divisors is an integer number (1749702240).

Almost surely, 2^20113515111 is an apocalyptic number.

20113515111 is a deficient number, since it is larger than the sum of its proper divisors (7881720729).

20113515111 is a wasteful number, since it uses less digits than its factorization.

20113515111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116846.

The product of its (nonzero) digits is 150, while the sum is 21.

The spelling of 20113515111 in words is "twenty billion, one hundred thirteen million, five hundred fifteen thousand, one hundred eleven".