2684927421 has 24 divisors (see below), whose sum is σ = 4243041504. Its totient is φ = 1622518560.

The previous prime is 2684927407. The next prime is 2684927423. The reversal of 2684927421 is 1247294862.

It is not a de Polignac number, because 2684927421 - 2²⁶ = 2617818557 is a prime.

It is a super-2 number, since 2×2684927421² = 14417670512075422482, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2684927423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4726 + ... + 73431.

It is an arithmetic number, because the mean of its divisors is an integer number (176793396).

Almost surely, 2^2684927421 is an apocalyptic number.

It is an amenable number.

2684927421 is a deficient number, since it is larger than the sum of its proper divisors (1558114083).

2684927421 is a wasteful number, since it uses less digits than its factorization.

2684927421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78521 (or 78518 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 2684927421 is about 51816.2852875426. The cubic root of 2684927421 is about 1389.8806758843.

The spelling of 2684927421 in words is "two billion, six hundred eighty-four million, nine hundred twenty-seven thousand, four hundred twenty-one".