20550456155 has 16 divisors (see below), whose sum is σ = 25465582560. Its totient is φ = 15910691328.

The previous prime is 20550456149. The next prime is 20550456167. The reversal of 20550456155 is 55165405502.

It is a cyclic number.

It is not a de Polignac number, because 20550456155 - 2¹⁰ = 20550455131 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 415022 + ... + 461891.

It is an arithmetic number, because the mean of its divisors is an integer number (1591598910).

Almost surely, 2^20550456155 is an apocalyptic number.

20550456155 is a deficient number, since it is larger than the sum of its proper divisors (4915126405).

20550456155 is a wasteful number, since it uses less digits than its factorization.

20550456155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877070.

The product of its (nonzero) digits is 150000, while the sum is 38.

The spelling of 20550456155 in words is "twenty billion, five hundred fifty million, four hundred fifty-six thousand, one hundred fifty-five".