2134181640 has 64 divisors (see below), whose sum is σ = 6538786560. Its totient is φ = 557004800.

The previous prime is 2134181597. The next prime is 2134181729. The reversal of 2134181640 is 461814312.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2134181598 and 2134181607.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183561 + ... + 194840.

It is an arithmetic number, because the mean of its divisors is an integer number (102168540).

Almost surely, 2^2134181640 is an apocalyptic number.

2134181640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2134181640 is an abundant number, since it is smaller than the sum of its proper divisors (4404604920).

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

2134181640 is a wasteful number, since it uses less digits than its factorization.

2134181640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378462 (or 378458 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 2134181640 is about 46197.2038114863. The cubic root of 2134181640 is about 1287.4897883376.

Adding to 2134181640 its reverse (461814312), we get a palindrome (2595995952).

The spelling of 2134181640 in words is "two billion, one hundred thirty-four million, one hundred eighty-one thousand, six hundred forty".