18580808400 has 720 divisors, whose sum is σ = 75927057024. Its totient is φ = 3801600000.

The previous prime is 18580808381. The next prime is 18580808401. The reversal of 18580808400 is 480808581.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18580808401) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 102656310 + ... + 102656490.

Almost surely, 2^18580808400 is an apocalyptic number.

18580808400 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 18580808400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37963528512).

18580808400 is an abundant number, since it is smaller than the sum of its proper divisors (57346248624).

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

18580808400 is a wasteful number, since it uses less digits than its factorization.

18580808400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 42.

The spelling of 18580808400 in words is "eighteen billion, five hundred eighty million, eight hundred eight thousand, four hundred".