20125755 has 24 divisors (see below), whose sum is σ = 37569168. Its totient is φ = 9907776.

The previous prime is 20125751. The next prime is 20125799. The reversal of 20125755 is 55752102.

It is a happy number.

It is not a de Polignac number, because 20125755 - 2² = 20125751 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20125751) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16617 + ... + 17786.

It is an arithmetic number, because the mean of its divisors is an integer number (1565382).

Almost surely, 2^20125755 is an apocalyptic number.

20125755 is a deficient number, since it is larger than the sum of its proper divisors (17443413).

20125755 is a wasteful number, since it uses less digits than its factorization.

20125755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34427 (or 34424 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 20125755 is about 4486.1737594525. The cubic root of 20125755 is about 272.0094927122.

Adding to 20125755 its reverse (55752102), we get a palindrome (75877857).

The spelling of 20125755 in words is "twenty million, one hundred twenty-five thousand, seven hundred fifty-five".