20525234 has 4 divisors (see below), whose sum is σ = 30787854. Its totient is φ = 10262616.

The previous prime is 20525231. The next prime is 20525251. The reversal of 20525234 is 43252502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15249025 + 5276209 = 3905^2 + 2297^2 .

It is not an unprimeable number, because it can be changed into a prime (20525231) 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 as a sum of consecutive naturals, namely, 5131307 + ... + 5131310.

Almost surely, 2^20525234 is an apocalyptic number.

20525234 is a deficient number, since it is larger than the sum of its proper divisors (10262620).

20525234 is a wasteful number, since it uses less digits than its factorization.

20525234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10262619.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 20525234 is about 4530.4783411909. The cubic root of 20525234 is about 273.7974331740.

Adding to 20525234 its reverse (43252502), we get a palindrome (63777736).

The spelling of 20525234 in words is "twenty million, five hundred twenty-five thousand, two hundred thirty-four".