20854832784 has 40 divisors (see below), whose sum is σ = 53887890240. Its totient is φ = 6949945728.

The previous prime is 20854832777. The next prime is 20854832797. The reversal of 20854832784 is 48723845802.

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, 159277 + ... + 258995.

It is an arithmetic number, because the mean of its divisors is an integer number (1347197256).

Almost surely, 2^20854832784 is an apocalyptic number.

20854832784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20854832784 is an abundant number, since it is smaller than the sum of its proper divisors (33033057456).

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

20854832784 is a wasteful number, since it uses less digits than its factorization.

20854832784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104087 (or 104081 counting only the distinct ones).

The product of its (nonzero) digits is 3440640, while the sum is 51.

The spelling of 20854832784 in words is "twenty billion, eight hundred fifty-four million, eight hundred thirty-two thousand, seven hundred eighty-four".