18896317650 has 144 divisors (see below), whose sum is σ = 58535253504. Its totient is φ = 4280855040.

The previous prime is 18896317633. The next prime is 18896317651. The reversal of 18896317650 is 5671369881.

18896317650 is a `hidden beast` number, since 188 + 96 + 317 + 65 + 0 = 666.

It is a super-4 number, since 4×18896317650⁴ (a number of 42 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (18896317651) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 329407 + ... + 382493.

It is an arithmetic number, because the mean of its divisors is an integer number (406494816).

Almost surely, 2^18896317650 is an apocalyptic number.

18896317650 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 18896317650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29267626752).

18896317650 is an abundant number, since it is smaller than the sum of its proper divisors (39638935854).

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

18896317650 is a wasteful number, since it uses less digits than its factorization.

18896317650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53225 (or 53217 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 18896317650 in words is "eighteen billion, eight hundred ninety-six million, three hundred seventeen thousand, six hundred fifty".