20179842240 has 168 divisors, whose sum is σ = 67621800240. Its totient is φ = 5097977856.

The previous prime is 20179842227. The next prime is 20179842283. The reversal of 20179842240 is 4224897102.

It is a happy 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, 317446 + ... + 375674.

Almost surely, 2^20179842240 is an apocalyptic number.

20179842240 is a gapful number since it is divisible by the number (20) 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 20179842240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33810900120).

20179842240 is an abundant number, since it is smaller than the sum of its proper divisors (47441958000).

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

20179842240 is a wasteful number, since it uses less digits than its factorization.

20179842240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58287 (or 58258 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The spelling of 20179842240 in words is "twenty billion, one hundred seventy-nine million, eight hundred forty-two thousand, two hundred forty".