18701843040 has 144 divisors (see below), whose sum is σ = 64719266976. Its totient is φ = 4916889600.

The previous prime is 18701843023. The next prime is 18701843137. The reversal of 18701843040 is 4034810781.

18701843040 is a `hidden beast` number, since 187 + 0 + 1 + 8 + 430 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is a junction number, because it is equal to n+sod(n) for n = 18701842986 and 18701843004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10780 + ... + 193700.

It is an arithmetic number, because the mean of its divisors is an integer number (449439354).

Almost surely, 2^18701843040 is an apocalyptic number.

18701843040 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 18701843040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32359633488).

18701843040 is an abundant number, since it is smaller than the sum of its proper divisors (46017423936).

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

18701843040 is a wasteful number, since it uses less digits than its factorization.

18701843040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183013 (or 183002 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The spelling of 18701843040 in words is "eighteen billion, seven hundred one million, eight hundred forty-three thousand, forty".