18787998239670 has 64 divisors (see below), whose sum is σ = 50024130958080. Its totient is φ = 4477468502400.

The previous prime is 18787998239639. The next prime is 18787998239671. The reversal of 18787998239670 is 7693289978781.

It is a happy number.

It is a super-4 number, since 4×18787998239670⁴ (a number of 54 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18787998239671) 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, 482466361 + ... + 482505300.

It is an arithmetic number, because the mean of its divisors is an integer number (781627046220).

Almost surely, 2^{18787998239670} is an apocalyptic number.

18787998239670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18787998239670 is an abundant number, since it is smaller than the sum of its proper divisors (31236132718410).

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

18787998239670 is a wasteful number, since it uses less digits than its factorization.

18787998239670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964971741.

The product of its (nonzero) digits is 4608866304, while the sum is 84.

The spelling of 18787998239670 in words is "eighteen trillion, seven hundred eighty-seven billion, nine hundred ninety-eight million, two hundred thirty-nine thousand, six hundred seventy".