18772909740 has 144 divisors (see below), whose sum is σ = 61375388256. Its totient is φ = 4617216000.

The previous prime is 18772909699. The next prime is 18772909747. The reversal of 18772909740 is 4790927781.

It is not an unprimeable number, because it can be changed into a prime (18772909747) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3743835 + ... + 3748845.

It is an arithmetic number, because the mean of its divisors is an integer number (426217974).

Almost surely, 2^18772909740 is an apocalyptic number.

18772909740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18772909740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30687694128).

18772909740 is an abundant number, since it is smaller than the sum of its proper divisors (42602478516).

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

18772909740 is a wasteful number, since it uses less digits than its factorization.

18772909740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6640 (or 6635 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 54.

The spelling of 18772909740 in words is "eighteen billion, seven hundred seventy-two million, nine hundred nine thousand, seven hundred forty".