17949780240 has 160 divisors (see below), whose sum is σ = 63632998656. Its totient is φ = 4100259840.

The previous prime is 17949780227. The next prime is 17949780283. The reversal of 17949780240 is 4208794971.

It is a super-2 number, since 2×17949780240² (a number of 21 digits) contains 22 as substring.

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, 4623100 + ... + 4626980.

Almost surely, 2^17949780240 is an apocalyptic number.

17949780240 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 17949780240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31816499328).

17949780240 is an abundant number, since it is smaller than the sum of its proper divisors (45683218416).

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

17949780240 is a wasteful number, since it uses less digits than its factorization.

17949780240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6657 (or 6651 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 51.

The spelling of 17949780240 in words is "seventeen billion, nine hundred forty-nine million, seven hundred eighty thousand, two hundred forty".