2123465240 has 128 divisors (see below), whose sum is σ = 5511240000. Its totient is φ = 729366528.

The previous prime is 2123465209. The next prime is 2123465243. The reversal of 2123465240 is 425643212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123465243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 785411 + ... + 788109.

Almost surely, 2^2123465240 is an apocalyptic number.

2123465240 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 2123465240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2755620000).

2123465240 is an abundant number, since it is smaller than the sum of its proper divisors (3387774760).

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

2123465240 is a wasteful number, since it uses less digits than its factorization.

2123465240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2829 (or 2825 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 2123465240 is about 46081.0724701585. The cubic root of 2123465240 is about 1285.3312070488.

The spelling of 2123465240 in words is "two billion, one hundred twenty-three million, four hundred sixty-five thousand, two hundred forty".