20455521346655 has 8 divisors (see below), whose sum is σ = 24559337499984. Its totient is φ = 16355942488000.

The previous prime is 20455521346643. The next prime is 20455521346753. The reversal of 20455521346655 is 55664312555402.

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

It is not a de Polignac number, because 20455521346655 - 2⁸ = 20455521346399 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20455521346597 and 20455521346606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1059313046 + ... + 1059332355.

It is an arithmetic number, because the mean of its divisors is an integer number (3069917187498).

Almost surely, 2^{20455521346655} is an apocalyptic number.

20455521346655 is a deficient number, since it is larger than the sum of its proper divisors (4103816153329).

20455521346655 is a wasteful number, since it uses less digits than its factorization.

20455521346655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2118647337.

The product of its (nonzero) digits is 21600000, while the sum is 53.

The spelling of 20455521346655 in words is "twenty trillion, four hundred fifty-five billion, five hundred twenty-one million, three hundred forty-six thousand, six hundred fifty-five".