18252311616 has 336 divisors, whose sum is σ = 65588814720. Its totient is φ = 4714536960.

The previous prime is 18252311611. The next prime is 18252311633. The reversal of 18252311616 is 61611325281.

18252311616 is a `hidden beast` number, since 1 + 8 + 2 + 5 + 2 + 31 + 1 + 616 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

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

It is not an unprimeable number, because it can be changed into a prime (18252311611) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8736300 + ... + 8738388.

Almost surely, 2^18252311616 is an apocalyptic number.

18252311616 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 18252311616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32794407360).

18252311616 is an abundant number, since it is smaller than the sum of its proper divisors (47336503104).

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

18252311616 is a wasteful number, since it uses less digits than its factorization.

18252311616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2322 (or 2309 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

Adding to 18252311616 its reverse (61611325281), we get a palindrome (79863636897).

It can be divided in two parts, 1825 and 2311616, that added together give a 4-th power (2313441 = 39⁴).

The spelling of 18252311616 in words is "eighteen billion, two hundred fifty-two million, three hundred eleven thousand, six hundred sixteen".