2101845240 has 128 divisors (see below), whose sum is σ = 7643116800. Its totient is φ = 509535360.

The previous prime is 2101845233. The next prime is 2101845257. The reversal of 2101845240 is 425481012.

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

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 31 ways as a sum of consecutive naturals, for example, 76582 + ... + 100341.

It is an arithmetic number, because the mean of its divisors is an integer number (59711850).

Almost surely, 2^2101845240 is an apocalyptic number.

2101845240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101845240 is an abundant number, since it is smaller than the sum of its proper divisors (5541271560).

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

2101845240 is a wasteful number, since it uses less digits than its factorization.

2101845240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176954 (or 176944 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 27.

The square root of 2101845240 is about 45845.8857477964. The cubic root of 2101845240 is about 1280.9541307227.

The spelling of 2101845240 in words is "two billion, one hundred one million, eight hundred forty-five thousand, two hundred forty".