18906972714 has 72 divisors (see below), whose sum is σ = 47699168868. Its totient is φ = 5396791680.

The previous prime is 18906972703. The next prime is 18906972719. The reversal of 18906972714 is 41727960981.

It can be written as a sum of positive squares in 2 ways, for example, as 17810237025 + 1096735689 = 133455^2 + 33117^2 .

It is not an unprimeable number, because it can be changed into a prime (18906972719) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 957784 + ... + 977324.

Almost surely, 2^18906972714 is an apocalyptic number.

18906972714 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18906972714, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23849584434).

18906972714 is an abundant number, since it is smaller than the sum of its proper divisors (28792196154).

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

18906972714 is a wasteful number, since it uses less digits than its factorization.

18906972714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20660 (or 20650 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The spelling of 18906972714 in words is "eighteen billion, nine hundred six million, nine hundred seventy-two thousand, seven hundred fourteen".