18827643240 has 160 divisors (see below), whose sum is σ = 72322145280. Its totient is φ = 4303456128.

The previous prime is 18827643227. The next prime is 18827643253. The reversal of 18827643240 is 4234672881.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18827643227) and next prime (18827643253).

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 392392 + ... + 437751.

It is an arithmetic number, because the mean of its divisors is an integer number (452013408).

Almost surely, 2^18827643240 is an apocalyptic number.

18827643240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18827643240 is an abundant number, since it is smaller than the sum of its proper divisors (53494502040).

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

18827643240 is a wasteful number, since it uses less digits than its factorization.

18827643240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830173 (or 830160 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The spelling of 18827643240 in words is "eighteen billion, eight hundred twenty-seven million, six hundred forty-three thousand, two hundred forty".