18740509830 has 96 divisors (see below), whose sum is σ = 56981193984. Its totient is φ = 4183921728.

The previous prime is 18740509829. The next prime is 18740509867. The reversal of 18740509830 is 3890504781.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 318804 + ... + 372983.

It is an arithmetic number, because the mean of its divisors is an integer number (593554104).

Almost surely, 2^18740509830 is an apocalyptic number.

18740509830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18740509830 is an abundant number, since it is smaller than the sum of its proper divisors (38240684154).

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

18740509830 is a wasteful number, since it uses less digits than its factorization.

18740509830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691850 (or 691847 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 18740509830 in words is "eighteen billion, seven hundred forty million, five hundred nine thousand, eight hundred thirty".