18801247920 has 640 divisors, whose sum is σ = 77035069440. Its totient is φ = 3680501760.

The previous prime is 18801247823. The next prime is 18801247963. The reversal of 18801247920 is 2974210881.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 29330800 + ... + 29331440.

It is an arithmetic number, because the mean of its divisors is an integer number (120367296).

Almost surely, 2^18801247920 is an apocalyptic number.

18801247920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18801247920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38517534720).

18801247920 is an abundant number, since it is smaller than the sum of its proper divisors (58233821520).

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

18801247920 is a wasteful number, since it uses less digits than its factorization.

18801247920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773 (or 767 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 42.

The spelling of 18801247920 in words is "eighteen billion, eight hundred one million, two hundred forty-seven thousand, nine hundred twenty".