18818742630 has 16 divisors (see below), whose sum is σ = 45164982384. Its totient is φ = 5018331360.

The previous prime is 18818742571. The next prime is 18818742653. The reversal of 18818742630 is 3624781881.

It is a self number, because there is not a number n which added to its sum of digits gives 18818742630.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313645681 + ... + 313645740.

It is an arithmetic number, because the mean of its divisors is an integer number (2822811399).

Almost surely, 2^18818742630 is an apocalyptic number.

18818742630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18818742630 is an abundant number, since it is smaller than the sum of its proper divisors (26346239754).

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

18818742630 is a wasteful number, since it uses less digits than its factorization.

18818742630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627291431.

The product of its (nonzero) digits is 516096, while the sum is 48.

The spelling of 18818742630 in words is "eighteen billion, eight hundred eighteen million, seven hundred forty-two thousand, six hundred thirty".