2179668840 has 32 divisors (see below), whose sum is σ = 6539006880. Its totient is φ = 581244992.

The previous prime is 2179668833. The next prime is 2179668871. The reversal of 2179668840 is 488669712.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9081834 + ... + 9082073.

It is an arithmetic number, because the mean of its divisors is an integer number (204343965).

Almost surely, 2^2179668840 is an apocalyptic number.

2179668840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2179668840 is an abundant number, since it is smaller than the sum of its proper divisors (4359338040).

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

2179668840 is a wasteful number, since it uses less digits than its factorization.

2179668840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18163921 (or 18163917 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 51.

The square root of 2179668840 is about 46686.9236510610. The cubic root of 2179668840 is about 1296.5725969635.

The spelling of 2179668840 in words is "two billion, one hundred seventy-nine million, six hundred sixty-eight thousand, eight hundred forty".