18566705240 has 64 divisors (see below), whose sum is σ = 42120540000. Its totient is φ = 7365427200.

The previous prime is 18566705197. The next prime is 18566705243. The reversal of 18566705240 is 4250766581.

It is a junction number, because it is equal to n+sod(n) for n = 18566705191 and 18566705200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18566705243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4581215 + ... + 4585265.

Almost surely, 2^18566705240 is an apocalyptic number.

18566705240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18566705240 is an abundant number, since it is smaller than the sum of its proper divisors (23553834760).

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

18566705240 is a wasteful number, since it uses less digits than its factorization.

18566705240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4980 (or 4976 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 44.

The spelling of 18566705240 in words is "eighteen billion, five hundred sixty-six million, seven hundred five thousand, two hundred forty".