18628185740 has 24 divisors (see below), whose sum is σ = 39124995840. Its totient is φ = 7450168448.

The previous prime is 18628185689. The next prime is 18628185743. The reversal of 18628185740 is 4758182681.

It is not an unprimeable number, because it can be changed into a prime (18628185743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76496 + ... + 207624.

It is an arithmetic number, because the mean of its divisors is an integer number (1630208160).

Almost surely, 2^18628185740 is an apocalyptic number.

18628185740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18628185740 is an abundant number, since it is smaller than the sum of its proper divisors (20496810100).

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

18628185740 is a wasteful number, since it uses less digits than its factorization.

18628185740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138241 (or 138239 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 50.

The spelling of 18628185740 in words is "eighteen billion, six hundred twenty-eight million, one hundred eighty-five thousand, seven hundred forty".