20064571155 has 40 divisors (see below), whose sum is σ = 36150322032. Its totient is φ = 10646741952.

The previous prime is 20064571151. The next prime is 20064571169. The reversal of 20064571155 is 55117546002.

20064571155 is a `hidden beast` number, since 2 + 0 + 0 + 645 + 7 + 1 + 1 + 5 + 5 = 666.

It is not a de Polignac number, because 20064571155 - 2² = 20064571151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20064571151) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 45957 + ... + 205526.

Almost surely, 2^20064571155 is an apocalyptic number.

20064571155 is a deficient number, since it is larger than the sum of its proper divisors (16085750877).

20064571155 is a wasteful number, since it uses less digits than its factorization.

20064571155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251697 (or 251688 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

The spelling of 20064571155 in words is "twenty billion, sixty-four million, five hundred seventy-one thousand, one hundred fifty-five".