20455778227 has 8 divisors (see below), whose sum is σ = 21733074000. Its totient is φ = 19216610784.

The previous prime is 20455778219. The next prime is 20455778237. The reversal of 20455778227 is 72287755402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20455778227 - 2³ = 20455778219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20455778237) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 9530977 + ... + 9533122.

It is an arithmetic number, because the mean of its divisors is an integer number (2716634250).

Almost surely, 2^20455778227 is an apocalyptic number.

20455778227 is a deficient number, since it is larger than the sum of its proper divisors (1277295773).

20455778227 is a wasteful number, since it uses less digits than its factorization.

20455778227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19064165.

The product of its (nonzero) digits is 2195200, while the sum is 49.

The spelling of 20455778227 in words is "twenty billion, four hundred fifty-five million, seven hundred seventy-eight thousand, two hundred twenty-seven".