20831718288 has 20 divisors (see below), whose sum is σ = 53815272368. Its totient is φ = 6943906080.

The previous prime is 20831718269. The next prime is 20831718329. The reversal of 20831718288 is 88281713802.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 433994131 = 20831718288 / (2 + 0 + 8 + 3 + 1 + 7 + 1 + 8 + 2 + 8 + 8).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 216997018 + ... + 216997113.

Almost surely, 2^20831718288 is an apocalyptic number.

It is an amenable number.

20831718288 is an abundant number, since it is smaller than the sum of its proper divisors (32983554080).

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

20831718288 is a wasteful number, since it uses less digits than its factorization.

20831718288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433994142 (or 433994136 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 48.

The spelling of 20831718288 in words is "twenty billion, eight hundred thirty-one million, seven hundred eighteen thousand, two hundred eighty-eight".