20125107 has 24 divisors (see below), whose sum is σ = 30595968. Its totient is φ = 12729600.

The previous prime is 20125103. The next prime is 20125109. The reversal of 20125107 is 70152102.

It is not a de Polignac number, because 20125107 - 2² = 20125103 is a prime.

It is a super-2 number, since 2×20125107² = 810039863522898, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20125107.

It is not an unprimeable number, because it can be changed into a prime (20125103) 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, 14107 + ... + 15467.

It is an arithmetic number, because the mean of its divisors is an integer number (1274832).

Almost surely, 2^20125107 is an apocalyptic number.

20125107 is a deficient number, since it is larger than the sum of its proper divisors (10470861).

20125107 is a wasteful number, since it uses less digits than its factorization.

20125107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451 (or 1448 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 20125107 is about 4486.1015369695. The cubic root of 20125107 is about 272.0065733345.

Adding to 20125107 its reverse (70152102), we get a palindrome (90277209).

The spelling of 20125107 in words is "twenty million, one hundred twenty-five thousand, one hundred seven".