2123785734 has 24 divisors (see below), whose sum is σ = 4941053208. Its totient is φ = 606795840.

The previous prime is 2123785733. The next prime is 2123785747. The reversal of 2123785734 is 4375873212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123785733) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3611587 + ... + 3612174.

It is an arithmetic number, because the mean of its divisors is an integer number (205877217).

Almost surely, 2^2123785734 is an apocalyptic number.

2123785734 is an abundant number, since it is smaller than the sum of its proper divisors (2817267474).

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

2123785734 is a wasteful number, since it uses less digits than its factorization.

2123785734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7223780 (or 7223773 counting only the distinct ones).

The product of its digits is 282240, while the sum is 42.

The square root of 2123785734 is about 46084.5498404834. The cubic root of 2123785734 is about 1285.3958686860.

The spelling of 2123785734 in words is "two billion, one hundred twenty-three million, seven hundred eighty-five thousand, seven hundred thirty-four".