18352009620 has 480 divisors, whose sum is σ = 68224020480. Its totient is φ = 4042275840.

The previous prime is 18352009553. The next prime is 18352009633. The reversal of 18352009620 is 2690025381.

18352009620 is a `hidden beast` number, since 1 + 8 + 3 + 5 + 20 + 0 + 9 + 620 = 666.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 80139666 + ... + 80139894.

It is an arithmetic number, because the mean of its divisors is an integer number (142133376).

Almost surely, 2^18352009620 is an apocalyptic number.

18352009620 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 18352009620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34112010240).

18352009620 is an abundant number, since it is smaller than the sum of its proper divisors (49872010860).

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

18352009620 is a wasteful number, since it uses less digits than its factorization.

18352009620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485 (or 474 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 18352009620 in words is "eighteen billion, three hundred fifty-two million, nine thousand, six hundred twenty".