20784453160 has 32 divisors (see below), whose sum is σ = 47101471200. Its totient is φ = 8253967680.

The previous prime is 20784453133. The next prime is 20784453163. The reversal of 20784453160 is 6135448702.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (20784453163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1863546 + ... + 1874665.

It is an arithmetic number, because the mean of its divisors is an integer number (1471920975).

Almost surely, 2^20784453160 is an apocalyptic number.

20784453160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20784453160 is an abundant number, since it is smaller than the sum of its proper divisors (26317018040).

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

20784453160 is a wasteful number, since it uses less digits than its factorization.

20784453160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3738361 (or 3738357 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 20784453160 in words is "twenty billion, seven hundred eighty-four million, four hundred fifty-three thousand, one hundred sixty".