20271672216 has 24 divisors (see below), whose sum is σ = 54902445780. Its totient is φ = 6757224048.

The previous prime is 20271672163. The next prime is 20271672217. The reversal of 20271672216 is 61227617202.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20271672217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 140775430 + ... + 140775573.

Almost surely, 2^20271672216 is an apocalyptic number.

It is an amenable number.

20271672216 is an abundant number, since it is smaller than the sum of its proper divisors (34630773564).

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

20271672216 is a wasteful number, since it uses less digits than its factorization.

20271672216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281551015 (or 281551008 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The spelling of 20271672216 in words is "twenty billion, two hundred seventy-one million, six hundred seventy-two thousand, two hundred sixteen".