2123340156 has 120 divisors (see below), whose sum is σ = 6363585536. Its totient is φ = 604778400.

The previous prime is 2123340119. The next prime is 2123340161. The reversal of 2123340156 is 6510433212.

2123340156 is a `hidden beast` number, since 21 + 233 + 401 + 5 + 6 = 666.

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 polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 831081 + ... + 833631.

Almost surely, 2^2123340156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2123340156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3181792768).

2123340156 is an abundant number, since it is smaller than the sum of its proper divisors (4240245380).

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

2123340156 is a wasteful number, since it uses less digits than its factorization.

2123340156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2941 (or 2930 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 2123340156 is about 46079.7152334951. The cubic root of 2123340156 is about 1285.3059688167.

Adding to 2123340156 its reverse (6510433212), we get a palindrome (8633773368).

The spelling of 2123340156 in words is "two billion, one hundred twenty-three million, three hundred forty thousand, one hundred fifty-six".