20125147 has 4 divisors (see below), whose sum is σ = 23000176. Its totient is φ = 17250120.

The previous prime is 20125117. The next prime is 20125153. The reversal of 20125147 is 74152102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74152102 = 2 ⋅37076051.

It is a cyclic number.

It is not a de Polignac number, because 20125147 - 2⁷ = 20125019 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 1437504 + ... + 1437517.

It is an arithmetic number, because the mean of its divisors is an integer number (5750044).

Almost surely, 2^20125147 is an apocalyptic number.

20125147 is a deficient number, since it is larger than the sum of its proper divisors (2875029).

20125147 is an equidigital number, since it uses as much as digits as its factorization.

20125147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2875028.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 20125147 is about 4486.1059951811. The cubic root of 20125147 is about 272.0067535448.

Adding to 20125147 its reverse (74152102), we get a palindrome (94277249).

The spelling of 20125147 in words is "twenty million, one hundred twenty-five thousand, one hundred forty-seven".