20078498831 has 4 divisors (see below), whose sum is σ = 20078784000. Its totient is φ = 20078213664.

The previous prime is 20078498777. The next prime is 20078498833. The reversal of 20078498831 is 13889487002.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20078498831 - 2²⁶ = 20011389967 is a prime.

It is a super-2 number, since 2×20078498831² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20078498831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20078498833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47495 + ... + 205943.

It is an arithmetic number, because the mean of its divisors is an integer number (5019696000).

Almost surely, 2^20078498831 is an apocalyptic number.

20078498831 is a deficient number, since it is larger than the sum of its proper divisors (285169).

20078498831 is a wasteful number, since it uses less digits than its factorization.

20078498831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285168.

The product of its (nonzero) digits is 774144, while the sum is 50.

The spelling of 20078498831 in words is "twenty billion, seventy-eight million, four hundred ninety-eight thousand, eight hundred thirty-one".