17940420280 has 128 divisors (see below), whose sum is σ = 43670016000. Its totient is φ = 6608250880.

The previous prime is 17940420271. The next prime is 17940420299. The reversal of 17940420280 is 8202404971.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9587745 + ... + 9589615.

It is an arithmetic number, because the mean of its divisors is an integer number (341172000).

Almost surely, 2^17940420280 is an apocalyptic number.

17940420280 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 17940420280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21835008000).

17940420280 is an abundant number, since it is smaller than the sum of its proper divisors (25729595720).

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

17940420280 is a wasteful number, since it uses less digits than its factorization.

17940420280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2197 (or 2193 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The spelling of 17940420280 in words is "seventeen billion, nine hundred forty million, four hundred twenty thousand, two hundred eighty".