2179821922084 has 9 divisors (see below), whose sum is σ = 3814693531131. Its totient is φ = 1089909484620.

The previous prime is 2179821921973. The next prime is 2179821922097. The reversal of 2179821922084 is 4802291289712.

The square root of 2179821922084 is 1476422.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×2179821922084² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2583739 + ... + 3321949.

Almost surely, 2^{2179821922084} is an apocalyptic number.

2179821922084 is the 1476422-nd square number.

It is an amenable number.

2179821922084 is a deficient number, since it is larger than the sum of its proper divisors (1634871609047).

2179821922084 is an frugal number, since it uses more digits than its factorization.

2179821922084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1476426 (or 738213 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 55.

The spelling of 2179821922084 in words is "two trillion, one hundred seventy-nine billion, eight hundred twenty-one million, nine hundred twenty-two thousand, eighty-four".