18810329400 has 144 divisors (see below), whose sum is σ = 63503256960. Its totient is φ = 4989734400.

The previous prime is 18810329357. The next prime is 18810329411. The reversal of 18810329400 is 492301881.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 316444 + ... + 371156.

It is an arithmetic number, because the mean of its divisors is an integer number (440994840).

Almost surely, 2^18810329400 is an apocalyptic number.

18810329400 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 18810329400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31751628480).

18810329400 is an abundant number, since it is smaller than the sum of its proper divisors (44692927560).

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

18810329400 is a wasteful number, since it uses less digits than its factorization.

18810329400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54926 (or 54914 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The spelling of 18810329400 in words is "eighteen billion, eight hundred ten million, three hundred twenty-nine thousand, four hundred".