18988704740 has 24 divisors (see below), whose sum is σ = 40848873912. Its totient is φ = 7410225920.

The previous prime is 18988704719. The next prime is 18988704743. The reversal of 18988704740 is 4740788981.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3022360576 + 15966344164 = 54976^2 + 126358^2 .

It is not an unprimeable number, because it can be changed into a prime (18988704743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11577659 + ... + 11579298.

It is an arithmetic number, because the mean of its divisors is an integer number (1702036413).

Almost surely, 2^18988704740 is an apocalyptic number.

18988704740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18988704740 is an abundant number, since it is smaller than the sum of its proper divisors (21860169172).

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

18988704740 is a wasteful number, since it uses less digits than its factorization.

18988704740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23157007 (or 23157005 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 56.

The spelling of 18988704740 in words is "eighteen billion, nine hundred eighty-eight million, seven hundred four thousand, seven hundred forty".