18803708640 has 288 divisors, whose sum is σ = 66017742336. Its totient is φ = 4870840320.

The previous prime is 18803708639. The next prime is 18803708647. The reversal of 18803708640 is 4680730881.

It is a tau number, because it is divible by the number of its divisors (288).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18803708647) 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, 17298177 + ... + 17299263.

It is an arithmetic number, because the mean of its divisors is an integer number (229228272).

Almost surely, 2^18803708640 is an apocalyptic number.

18803708640 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 18803708640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33008871168).

18803708640 is an abundant number, since it is smaller than the sum of its proper divisors (47214033696).

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

18803708640 is a wasteful number, since it uses less digits than its factorization.

18803708640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442 (or 1431 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 18803708640 in words is "eighteen billion, eight hundred three million, seven hundred eight thousand, six hundred forty".