18401211000 has 192 divisors, whose sum is σ = 62390933280. Its totient is φ = 4891622400.

The previous prime is 18401210987. The next prime is 18401211071. The reversal of 18401211000 is 11210481.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3029967 + ... + 3036033.

Almost surely, 2^18401211000 is an apocalyptic number.

18401211000 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 18401211000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31195466640).

18401211000 is an abundant number, since it is smaller than the sum of its proper divisors (43989722280).

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

18401211000 is a wasteful number, since it uses less digits than its factorization.

18401211000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6431 (or 6414 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 18401211000 its reverse (11210481), we get a palindrome (18412421481).

The spelling of 18401211000 in words is "eighteen billion, four hundred one million, two hundred eleven thousand".