20525636 has 12 divisors (see below), whose sum is σ = 36136128. Its totient is φ = 10201032.

The previous prime is 20525633. The next prime is 20525653. The reversal of 20525636 is 63652502.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20525599 and 20525608.

It is not an unprimeable number, because it can be changed into a prime (20525633) 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, 14696 + ... + 16031.

It is an arithmetic number, because the mean of its divisors is an integer number (3011344).

Almost surely, 2^20525636 is an apocalyptic number.

It is an amenable number.

20525636 is a deficient number, since it is larger than the sum of its proper divisors (15610492).

20525636 is a wasteful number, since it uses less digits than its factorization.

20525636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30898 (or 30896 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 20525636 is about 4530.5227071498. The cubic root of 20525636 is about 273.7992206624.

The spelling of 20525636 in words is "twenty million, five hundred twenty-five thousand, six hundred thirty-six".