20523056 has 20 divisors (see below), whose sum is σ = 39834504. Its totient is φ = 10243200.

The previous prime is 20523053. The next prime is 20523077. The reversal of 20523056 is 65032502.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20523053) 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, 14876 + ... + 16196.

Almost surely, 2^20523056 is an apocalyptic number.

It is an amenable number.

20523056 is a deficient number, since it is larger than the sum of its proper divisors (19311448).

20523056 is a wasteful number, since it uses less digits than its factorization.

20523056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2300 (or 2294 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 20523056 is about 4530.2379628448. The cubic root of 20523056 is about 273.7877483165.

Adding to 20523056 its reverse (65032502), we get a palindrome (85555558).

The spelling of 20523056 in words is "twenty million, five hundred twenty-three thousand, fifty-six".