2123636346 has 128 divisors (see below), whose sum is σ = 5400864000. Its totient is φ = 613122048.

The previous prime is 2123636303. The next prime is 2123636377. The reversal of 2123636346 is 6436363212.

2123636346 is a `hidden beast` number, since 2 + 12 + 3 + 6 + 3 + 634 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 2123636346.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1506490 + ... + 1507898.

It is an arithmetic number, because the mean of its divisors is an integer number (42194250).

Almost surely, 2^2123636346 is an apocalyptic number.

2123636346 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2123636346, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2700432000).

2123636346 is an abundant number, since it is smaller than the sum of its proper divisors (3277227654).

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

2123636346 is a wasteful number, since it uses less digits than its factorization.

2123636346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565 (or 1559 counting only the distinct ones).

The product of its digits is 93312, while the sum is 36.

The square root of 2123636346 is about 46082.9290084734. The cubic root of 2123636346 is about 1285.3657295470.

Adding to 2123636346 its reverse (6436363212), we get a palindrome (8559999558).

The spelling of 2123636346 in words is "two billion, one hundred twenty-three million, six hundred thirty-six thousand, three hundred forty-six".