20455224256 has 14 divisors (see below), whose sum is σ = 40590835760. Its totient is φ = 10227612096.

The previous prime is 20455224247. The next prime is 20455224277. The reversal of 20455224256 is 65242255402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159806376 + ... + 159806503.

Almost surely, 2^20455224256 is an apocalyptic number.

It is an amenable number.

20455224256 is a deficient number, since it is larger than the sum of its proper divisors (20135611504).

20455224256 is an equidigital number, since it uses as much as digits as its factorization.

20455224256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319612891 (or 319612881 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 37.

Adding to 20455224256 its reverse (65242255402), we get a palindrome (85697479658).

The spelling of 20455224256 in words is "twenty billion, four hundred fifty-five million, two hundred twenty-four thousand, two hundred fifty-six".