20500107 has 24 divisors (see below), whose sum is σ = 30138624. Its totient is φ = 12369456.

The previous prime is 20500097. The next prime is 20500159. The reversal of 20500107 is 70100502.

It is a happy number.

It is not a de Polignac number, because 20500107 - 2⁴ = 20500091 is a prime.

It is a super-2 number, since 2×20500107² = 840508774022898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20500807) 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, 24498 + ... + 25320.

It is an arithmetic number, because the mean of its divisors is an integer number (1255776).

Almost surely, 2^20500107 is an apocalyptic number.

20500107 is a deficient number, since it is larger than the sum of its proper divisors (9638517).

20500107 is a wasteful number, since it uses less digits than its factorization.

20500107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887 (or 868 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 15.

The square root of 20500107 is about 4527.7043852266. The cubic root of 20500107 is about 273.6856599068.

Adding to 20500107 its reverse (70100502), we get a palindrome (90600609).

The spelling of 20500107 in words is "twenty million, five hundred thousand, one hundred seven".