20113015 has 16 divisors (see below), whose sum is σ = 26697888. Its totient is φ = 14449536.

The previous prime is 20113013. The next prime is 20113019. The reversal of 20113015 is 51031102.

It is not a de Polignac number, because 20113015 - 2¹ = 20113013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20112986 and 20113004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113013) 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, 1777 + ... + 6586.

It is an arithmetic number, because the mean of its divisors is an integer number (1668618).

Almost surely, 2^20113015 is an apocalyptic number.

20113015 is a deficient number, since it is larger than the sum of its proper divisors (6584873).

20113015 is a wasteful number, since it uses less digits than its factorization.

20113015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8418.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 20113015 is about 4484.7536164209. The cubic root of 20113015 is about 271.9520848052.

Adding to 20113015 its reverse (51031102), we get a palindrome (71144117).

The spelling of 20113015 in words is "twenty million, one hundred thirteen thousand, fifteen".