18841559040 has 392 divisors, whose sum is σ = 67901899248. Its totient is φ = 5016453120.

The previous prime is 18841559039. The next prime is 18841559047. The reversal of 18841559040 is 4095514881.

It is a happy number.

18841559040 is a `hidden beast` number, since 1 + 8 + 8 + 4 + 15 + 590 + 40 = 666.

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 (18841559047) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 29859525 + ... + 29860155.

Almost surely, 2^18841559040 is an apocalyptic number.

18841559040 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 18841559040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33950949624).

18841559040 is an abundant number, since it is smaller than the sum of its proper divisors (49060340208).

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

18841559040 is an frugal number, since it uses more digits than its factorization.

18841559040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 45.

The spelling of 18841559040 in words is "eighteen billion, eight hundred forty-one million, five hundred fifty-nine thousand, forty".