18530743820 has 12 divisors (see below), whose sum is σ = 38914562064. Its totient is φ = 7412297520.

The previous prime is 18530743807. The next prime is 18530743823. The reversal of 18530743820 is 2834703581.

It is not an unprimeable number, because it can be changed into a prime (18530743823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 463268576 + ... + 463268615.

It is an arithmetic number, because the mean of its divisors is an integer number (3242880172).

Almost surely, 2^18530743820 is an apocalyptic number.

18530743820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18530743820 is an abundant number, since it is smaller than the sum of its proper divisors (20383818244).

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

18530743820 is a wasteful number, since it uses less digits than its factorization.

18530743820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926537200 (or 926537198 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The spelling of 18530743820 in words is "eighteen billion, five hundred thirty million, seven hundred forty-three thousand, eight hundred twenty".