20675055663 has 12 divisors (see below), whose sum is σ = 29881224360. Its totient is φ = 13775406576.

The previous prime is 20675055659. The next prime is 20675055673. The reversal of 20675055663 is 36655057602.

20675055663 is a `hidden beast` number, since 20 + 6 + 75 + 0 + 556 + 6 + 3 = 666.

It is not a de Polignac number, because 20675055663 - 2² = 20675055659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20675055623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 647193 + ... + 678386.

It is an arithmetic number, because the mean of its divisors is an integer number (2490102030).

Almost surely, 2^20675055663 is an apocalyptic number.

20675055663 is a deficient number, since it is larger than the sum of its proper divisors (9206168697).

20675055663 is a wasteful number, since it uses less digits than its factorization.

20675055663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327318 (or 1327315 counting only the distinct ones).

The product of its (nonzero) digits is 1134000, while the sum is 45.

The spelling of 20675055663 in words is "twenty billion, six hundred seventy-five million, fifty-five thousand, six hundred sixty-three".