2123509968 has 30 divisors (see below), whose sum is σ = 5942878994. Its totient is φ = 707836608.

The previous prime is 2123509943. The next prime is 2123509991. The reversal of 2123509968 is 8699053212.

It can be written as a sum of positive squares in only one way, i.e., 1951165584 + 172344384 = 44172^2 + 13128^2 .

It is a super-2 number, since 2×2123509968² = 9018589168390722048, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7373155 + ... + 7373442.

Almost surely, 2^2123509968 is an apocalyptic number.

It is an amenable number.

2123509968 is an abundant number, since it is smaller than the sum of its proper divisors (3819369026).

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

2123509968 is a wasteful number, since it uses less digits than its factorization.

2123509968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14746611 (or 14746602 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 2123509968 is about 46081.5577861686. The cubic root of 2123509968 is about 1285.3402315887.

The spelling of 2123509968 in words is "two billion, one hundred twenty-three million, five hundred nine thousand, nine hundred sixty-eight".