20555367216 has 80 divisors (see below), whose sum is σ = 56771080704. Its totient is φ = 6386107392.

The previous prime is 20555367211. The next prime is 20555367221. The reversal of 20555367216 is 61276355502.

It is an interprime number because it is at equal distance from previous prime (20555367211) and next prime (20555367221).

It is not an unprimeable number, because it can be changed into a prime (20555367211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38236 + ... + 206331.

Almost surely, 2^20555367216 is an apocalyptic number.

It is an amenable number.

20555367216 is an abundant number, since it is smaller than the sum of its proper divisors (36215713488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20555367216 is a wasteful number, since it uses less digits than its factorization.

20555367216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244698 (or 244692 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 42.

The spelling of 20555367216 in words is "twenty billion, five hundred fifty-five million, three hundred sixty-seven thousand, two hundred sixteen".