20125090 has 16 divisors (see below), whose sum is σ = 36437688. Its totient is φ = 8002816.

The previous prime is 20125087. The next prime is 20125099. The reversal of 20125090 is 9052102.

It can be written as a sum of positive squares in 4 ways, for example, as 19775809 + 349281 = 4447^2 + 591^2 .

It is not an unprimeable number, because it can be changed into a prime (20125099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4087 + ... + 7546.

Almost surely, 2^20125090 is an apocalyptic number.

20125090 is a deficient number, since it is larger than the sum of its proper divisors (16312598).

20125090 is a wasteful number, since it uses less digits than its factorization.

20125090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11813.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 20125090 is about 4486.0996422282. The cubic root of 20125090 is about 272.0064967451.

Adding to 20125090 its reverse (9052102), we get a palindrome (29177192).

The spelling of 20125090 in words is "twenty million, one hundred twenty-five thousand, ninety".