20517084384 has 24 divisors (see below), whose sum is σ = 53857346760. Its totient is φ = 6839028096.

The previous prime is 20517084377. The next prime is 20517084403. The reversal of 20517084384 is 48348071502.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106859719 + ... + 106859910.

It is an arithmetic number, because the mean of its divisors is an integer number (2244056115).

Almost surely, 2^20517084384 is an apocalyptic number.

20517084384 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20517084384 is an abundant number, since it is smaller than the sum of its proper divisors (33340262376).

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

20517084384 is a wasteful number, since it uses less digits than its factorization.

20517084384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213719642 (or 213719634 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The spelling of 20517084384 in words is "twenty billion, five hundred seventeen million, eighty-four thousand, three hundred eighty-four".