20125115 has 16 divisors (see below), whose sum is σ = 25401600. Its totient is φ = 15277152.

The previous prime is 20125109. The next prime is 20125117. The reversal of 20125115 is 51152102.

It is not a de Polignac number, because 20125115 - 2⁴ = 20125099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20125093 and 20125102.

It is not an unprimeable number, because it can be changed into a prime (20125117) 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, 15356 + ... + 16614.

It is an arithmetic number, because the mean of its divisors is an integer number (1587600).

Almost surely, 2^20125115 is an apocalyptic number.

20125115 is a deficient number, since it is larger than the sum of its proper divisors (5276485).

20125115 is a wasteful number, since it uses less digits than its factorization.

20125115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 20125115 is about 4486.1024286122. The cubic root of 20125115 is about 272.0066093766.

Adding to 20125115 its reverse (51152102), we get a palindrome (71277217).

The spelling of 20125115 in words is "twenty million, one hundred twenty-five thousand, one hundred fifteen".