2101403440 has 20 divisors (see below), whose sum is σ = 4885763184. Its totient is φ = 840561344.

The previous prime is 2101403431. The next prime is 2101403443. The reversal of 2101403440 is 443041012.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (2101403443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13133692 + ... + 13133851.

Almost surely, 2^2101403440 is an apocalyptic number.

2101403440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101403440 is an abundant number, since it is smaller than the sum of its proper divisors (2784359744).

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

2101403440 is a wasteful number, since it uses less digits than its factorization.

2101403440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26267556 (or 26267550 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 2101403440 is about 45841.0671778047. The cubic root of 2101403440 is about 1280.8643738461.

Adding to 2101403440 its reverse (443041012), we get a palindrome (2544444452).

It can be divided in two parts, 210 and 1403440, that added together give a triangular number (1403650 = T₁₆₇₅).

The spelling of 2101403440 in words is "two billion, one hundred one million, four hundred three thousand, four hundred forty".