2123321838 has 16 divisors (see below), whose sum is σ = 4632702336. Its totient is φ = 643430840.

The previous prime is 2123321831. The next prime is 2123321911. The reversal of 2123321838 is 8381233212.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 2123321799 and 2123321808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123321831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16085706 + ... + 16085837.

It is an arithmetic number, because the mean of its divisors is an integer number (289543896).

Almost surely, 2^2123321838 is an apocalyptic number.

2123321838 is an abundant number, since it is smaller than the sum of its proper divisors (2509380498).

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

2123321838 is a wasteful number, since it uses less digits than its factorization.

2123321838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32171559.

The product of its digits is 13824, while the sum is 33.

The square root of 2123321838 is about 46079.5164688172. The cubic root of 2123321838 is about 1285.3022727058.

It can be divided in two parts, 21233 and 21838, that added together give a triangular number (43071 = T₂₉₃).

The spelling of 2123321838 in words is "two billion, one hundred twenty-three million, three hundred twenty-one thousand, eight hundred thirty-eight".