2133421684 has 12 divisors (see below), whose sum is σ = 3767740900. Its totient is φ = 1056924288.

The previous prime is 2133421673. The next prime is 2133421691. The reversal of 2133421684 is 4861243312.

It can be written as a sum of positive squares in 2 ways, for example, as 1949222500 + 184199184 = 44150^2 + 13572^2 .

It is a super-2 number, since 2×2133421684² = 9102976163522791712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2446149 + ... + 2447020.

Almost surely, 2^2133421684 is an apocalyptic number.

It is an amenable number.

2133421684 is a deficient number, since it is larger than the sum of its proper divisors (1634319216).

2133421684 is a wasteful number, since it uses less digits than its factorization.

2133421684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4893282 (or 4893280 counting only the distinct ones).

The product of its digits is 27648, while the sum is 34.

The square root of 2133421684 is about 46188.9779492900. The cubic root of 2133421684 is about 1287.3369504019.

Adding to 2133421684 its reverse (4861243312), we get a palindrome (6994664996).

The spelling of 2133421684 in words is "two billion, one hundred thirty-three million, four hundred twenty-one thousand, six hundred eighty-four".