20501056 has 14 divisors (see below), whose sum is σ = 40681910. Its totient is φ = 10250496.

The previous prime is 20501029. The next prime is 20501069. The reversal of 20501056 is 65010502.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19501056 + 1000000 = 4416^2 + 1000^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160101 + ... + 160228.

Almost surely, 2^20501056 is an apocalyptic number.

It is an amenable number.

20501056 is a deficient number, since it is larger than the sum of its proper divisors (20180854).

20501056 is an equidigital number, since it uses as much as digits as its factorization.

20501056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320341 (or 320331 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 20501056 is about 4527.8091832585. The cubic root of 20501056 is about 273.6898830341.

Adding to 20501056 its reverse (65010502), we get a palindrome (85511558).

The spelling of 20501056 in words is "twenty million, five hundred one thousand, fifty-six".