2134821420 has 120 divisors (see below), whose sum is σ = 6778127664. Its totient is φ = 562391424.

The previous prime is 2134821347. The next prime is 2134821431. The reversal of 2134821420 is 241284312.

2134821420 is a `hidden beast` number, since 213 + 4 + 8 + 21 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 39 ways as a sum of consecutive naturals, for example, 126522 + ... + 142398.

Almost surely, 2^2134821420 is an apocalyptic number.

2134821420 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 2134821420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3389063832).

2134821420 is an abundant number, since it is smaller than the sum of its proper divisors (4643306244).

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

2134821420 is a wasteful number, since it uses less digits than its factorization.

2134821420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15981 (or 15970 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 2134821420 is about 46204.1277376816. The cubic root of 2134821420 is about 1287.6184290471.

The spelling of 2134821420 in words is "two billion, one hundred thirty-four million, eight hundred twenty-one thousand, four hundred twenty".