18948831765 has 32 divisors (see below), whose sum is σ = 32027529600. Its totient is φ = 9540034560.

The previous prime is 18948831763. The next prime is 18948831779. The reversal of 18948831765 is 56713884981.

It is not a de Polignac number, because 18948831765 - 2¹ = 18948831763 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18948831699 and 18948831708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18948831761) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38220 + ... + 198389.

It is an arithmetic number, because the mean of its divisors is an integer number (1000860300).

Almost surely, 2^18948831765 is an apocalyptic number.

18948831765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18948831765 is a deficient number, since it is larger than the sum of its proper divisors (13078697835).

18948831765 is a wasteful number, since it uses less digits than its factorization.

18948831765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236917.

The product of its digits is 11612160, while the sum is 60.

The spelling of 18948831765 in words is "eighteen billion, nine hundred forty-eight million, eight hundred thirty-one thousand, seven hundred sixty-five".