18485739216 has 480 divisors, whose sum is σ = 65980062720. Its totient is φ = 4928926464.

The previous prime is 18485739199. The next prime is 18485739229. The reversal of 18485739216 is 61293758481.

18485739216 is a `hidden beast` number, since 1 + 8 + 48 + 573 + 9 + 21 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 20934711 + ... + 20935593.

It is an arithmetic number, because the mean of its divisors is an integer number (137458464).

Almost surely, 2^18485739216 is an apocalyptic number.

18485739216 is a gapful number since it is divisible by the number (16) 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 18485739216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32990031360).

18485739216 is an abundant number, since it is smaller than the sum of its proper divisors (47494323504).

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

18485739216 is a wasteful number, since it uses less digits than its factorization.

18485739216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980 (or 961 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 18485739216 in words is "eighteen billion, four hundred eighty-five million, seven hundred thirty-nine thousand, two hundred sixteen".