18840540672 has 60 divisors (see below), whose sum is σ = 54375089340. Its totient is φ = 6280178688.

The previous prime is 18840540661. The next prime is 18840540701. The reversal of 18840540672 is 27604504881.

18840540672 is a `hidden beast` number, since 1 + 8 + 8 + 40 + 540 + 67 + 2 = 666.

It is a super-3 number, since 3×18840540672³ (a number of 32 digits) contains 333 as substring.

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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2039722 + ... + 2048937.

It is an arithmetic number, because the mean of its divisors is an integer number (906251489).

Almost surely, 2^18840540672 is an apocalyptic number.

18840540672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18840540672 is an abundant number, since it is smaller than the sum of its proper divisors (35534548668).

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

18840540672 is an equidigital number, since it uses as much as digits as its factorization.

18840540672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4088683 (or 4088664 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The spelling of 18840540672 in words is "eighteen billion, eight hundred forty million, five hundred forty thousand, six hundred seventy-two".