18299807820 has 384 divisors, whose sum is σ = 69531033600. Its totient is φ = 3902494464.

The previous prime is 18299807819. The next prime is 18299807833. The reversal of 18299807820 is 2870899281.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 4810039 + ... + 4813841.

It is an arithmetic number, because the mean of its divisors is an integer number (181070400).

Almost surely, 2^18299807820 is an apocalyptic number.

18299807820 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 18299807820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34765516800).

18299807820 is an abundant number, since it is smaller than the sum of its proper divisors (51231225780).

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

18299807820 is a wasteful number, since it uses less digits than its factorization.

18299807820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3914 (or 3906 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The spelling of 18299807820 in words is "eighteen billion, two hundred ninety-nine million, eight hundred seven thousand, eight hundred twenty".