20501113 has 4 divisors (see below), whose sum is σ = 20579328. Its totient is φ = 20422900.

The previous prime is 20501069. The next prime is 20501123. The reversal of 20501113 is 31110502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31110502 = 2 ⋅15555251.

It is a cyclic number.

It is not a de Polignac number, because 20501113 - 2¹³ = 20492921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20501093 and 20501102.

It is not an unprimeable number, because it can be changed into a prime (20501123) 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 3 ways as a sum of consecutive naturals, for example, 38713 + ... + 39238.

It is an arithmetic number, because the mean of its divisors is an integer number (5144832).

Almost surely, 2^20501113 is an apocalyptic number.

It is an amenable number.

20501113 is a deficient number, since it is larger than the sum of its proper divisors (78215).

20501113 is an equidigital number, since it uses as much as digits as its factorization.

20501113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78214.

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

The square root of 20501113 is about 4527.8154776890. The cubic root of 20501113 is about 273.6901366846.

Adding to 20501113 its reverse (31110502), we get a palindrome (51611615).

The spelling of 20501113 in words is "twenty million, five hundred one thousand, one hundred thirteen".