18420345510 has 128 divisors (see below), whose sum is σ = 51511403520. Its totient is φ = 4128689664.

The previous prime is 18420345481. The next prime is 18420345533. The reversal of 18420345510 is 1554302481.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3219172 + ... + 3224888.

It is an arithmetic number, because the mean of its divisors is an integer number (402432840).

Almost surely, 2^18420345510 is an apocalyptic number.

18420345510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18420345510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25755701760).

18420345510 is an abundant number, since it is smaller than the sum of its proper divisors (33091058010).

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

18420345510 is a wasteful number, since it uses less digits than its factorization.

18420345510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6030.

The product of its (nonzero) digits is 19200, while the sum is 33.

Adding to 18420345510 its reverse (1554302481), we get a palindrome (19974647991).

The spelling of 18420345510 in words is "eighteen billion, four hundred twenty million, three hundred forty-five thousand, five hundred ten".