20831898368 has 36 divisors (see below), whose sum is σ = 41591663568. Its totient is φ = 10413634560.

The previous prime is 20831898359. The next prime is 20831898371. The reversal of 20831898368 is 86389813802.

It is a super-2 number, since 2×20831898368² (a number of 21 digits) contains 22 as substring.

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, 2151458 + ... + 2161118.

It is an arithmetic number, because the mean of its divisors is an integer number (1155323988).

Almost surely, 2^20831898368 is an apocalyptic number.

It is an amenable number.

20831898368 is a deficient number, since it is larger than the sum of its proper divisors (20759765200).

20831898368 is an frugal number, since it uses more digits than its factorization.

20831898368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18100 (or 18086 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 56.

The spelling of 20831898368 in words is "twenty billion, eight hundred thirty-one million, eight hundred ninety-eight thousand, three hundred sixty-eight".