20655650201587 has 2 divisors, whose sum is σ = 20655650201588. Its totient is φ = 20655650201586.

The previous prime is 20655650201573. The next prime is 20655650201609. The reversal of 20655650201587 is 78510205655602.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20655650201587 is a prime.

It is not a weakly prime, because it can be changed into another prime (20655650201387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10327825100793 + 10327825100794.

It is an arithmetic number, because the mean of its divisors is an integer number (10327825100794).

Almost surely, 2^{20655650201587} is an apocalyptic number.

20655650201587 is a deficient number, since it is larger than the sum of its proper divisors (1).

20655650201587 is an equidigital number, since it uses as much as digits as its factorization.

20655650201587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040000, while the sum is 52.

The spelling of 20655650201587 in words is "twenty trillion, six hundred fifty-five billion, six hundred fifty million, two hundred one thousand, five hundred eighty-seven".