2101343640 has 64 divisors (see below), whose sum is σ = 6877128960. Its totient is φ = 509416320.

The previous prime is 2101343591. The next prime is 2101343659. The reversal of 2101343640 is 463431012.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 2101343640.

It is a congruent number.

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, 794644 + ... + 797283.

It is an arithmetic number, because the mean of its divisors is an integer number (107455140).

Almost surely, 2^2101343640 is an apocalyptic number.

2101343640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101343640 is an abundant number, since it is smaller than the sum of its proper divisors (4775785320).

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

2101343640 is a wasteful number, since it uses less digits than its factorization.

2101343640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1591952 (or 1591948 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 2101343640 is about 45840.4149195882. The cubic root of 2101343640 is about 1280.8522238047.

Adding to 2101343640 its reverse (463431012), we get a palindrome (2564774652).

The spelling of 2101343640 in words is "two billion, one hundred one million, three hundred forty-three thousand, six hundred forty".