20884217472 has 64 divisors (see below), whose sum is σ = 61637457600. Its totient is φ = 6961404672.

The previous prime is 20884217449. The next prime is 20884217503. The reversal of 20884217472 is 27471248802.

It is a tau number, because it is divible by the number of its divisors (64).

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, 3017988 + ... + 3024899.

It is an arithmetic number, because the mean of its divisors is an integer number (963085275).

Almost surely, 2^20884217472 is an apocalyptic number.

It is an amenable number.

20884217472 is an abundant number, since it is smaller than the sum of its proper divisors (40753240128).

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

20884217472 is an equidigital number, since it uses as much as digits as its factorization.

20884217472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6042910 (or 6042892 counting only the distinct ones).

The product of its (nonzero) digits is 401408, while the sum is 45.

The spelling of 20884217472 in words is "twenty billion, eight hundred eighty-four million, two hundred seventeen thousand, four hundred seventy-two".