20125049 has 4 divisors (see below), whose sum is σ = 23000064. Its totient is φ = 17250036.

The previous prime is 20125037. The next prime is 20125051. The reversal of 20125049 is 94052102.

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: 94052102 = 2 ⋅47026051.

It is a cyclic number.

It is not a de Polignac number, because 20125049 - 2⁴ = 20125033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20125019) 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, 1437497 + ... + 1437510.

It is an arithmetic number, because the mean of its divisors is an integer number (5750016).

Almost surely, 2^20125049 is an apocalyptic number.

It is an amenable number.

20125049 is a deficient number, since it is larger than the sum of its proper divisors (2875015).

20125049 is an equidigital number, since it uses as much as digits as its factorization.

20125049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2875014.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 20125049 is about 4486.0950725547. The cubic root of 20125049 is about 272.0063120291.

The spelling of 20125049 in words is "twenty million, one hundred twenty-five thousand, forty-nine".