20005555216 has 40 divisors (see below), whose sum is σ = 39013869024. Its totient is φ = 9937655040.

The previous prime is 20005555201. The next prime is 20005555237. The reversal of 20005555216 is 61255550002.

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, 1735231 + ... + 1746721.

Almost surely, 2^20005555216 is an apocalyptic number.

It is an amenable number.

20005555216 is a deficient number, since it is larger than the sum of its proper divisors (19008313808).

20005555216 is a wasteful number, since it uses less digits than its factorization.

20005555216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12199 (or 12193 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 31.

The spelling of 20005555216 in words is "twenty billion, five million, five hundred fifty-five thousand, two hundred sixteen".