18641942000 has 80 divisors (see below), whose sum is σ = 49174111584. Its totient is φ = 6778880000.

The previous prime is 18641941987. The next prime is 18641942003. The reversal of 18641942000 is 24914681.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18641942003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 401681 + ... + 445680.

Almost surely, 2^18641942000 is an apocalyptic number.

18641942000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18641942000 is an abundant number, since it is smaller than the sum of its proper divisors (30532169584).

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

18641942000 is a wasteful number, since it uses less digits than its factorization.

18641942000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847395 (or 847379 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The spelling of 18641942000 in words is "eighteen billion, six hundred forty-one million, nine hundred forty-two thousand".