20155113 has 24 divisors (see below), whose sum is σ = 31980000. Its totient is φ = 12130560.

The previous prime is 20155097. The next prime is 20155117. The reversal of 20155113 is 31155102.

It is not a de Polignac number, because 20155113 - 2⁴ = 20155097 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20155117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15513 + ... + 16761.

It is an arithmetic number, because the mean of its divisors is an integer number (1332500).

Almost surely, 2^20155113 is an apocalyptic number.

It is an amenable number.

20155113 is a deficient number, since it is larger than the sum of its proper divisors (11824887).

20155113 is a wasteful number, since it uses less digits than its factorization.

20155113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1429 (or 1426 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 20155113 is about 4489.4446204403. Note that the first 3 decimals coincide. The cubic root of 20155113 is about 272.1416910631.

The spelling of 20155113 in words is "twenty million, one hundred fifty-five thousand, one hundred thirteen".