17864938540 has 48 divisors (see below), whose sum is σ = 38834933760. Its totient is φ = 6896111040.

The previous prime is 17864938517. The next prime is 17864938547. The reversal of 17864938540 is 4583946871.

It is not an unprimeable number, because it can be changed into a prime (17864938547) 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, 182449 + ... + 262711.

It is an arithmetic number, because the mean of its divisors is an integer number (809061120).

Almost surely, 2^17864938540 is an apocalyptic number.

17864938540 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 17864938540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19417466880).

17864938540 is an abundant number, since it is smaller than the sum of its proper divisors (20969995220).

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

17864938540 is a wasteful number, since it uses less digits than its factorization.

17864938540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80662 (or 80660 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 17864938540 in words is "seventeen billion, eight hundred sixty-four million, nine hundred thirty-eight thousand, five hundred forty".