2123442140 has 24 divisors (see below), whose sum is σ = 4554107712. Its totient is φ = 831304640.

The previous prime is 2123442127. The next prime is 2123442149. The reversal of 2123442140 is 412443212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123442149) 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, 1128551 + ... + 1130430.

It is an arithmetic number, because the mean of its divisors is an integer number (189754488).

Almost surely, 2^2123442140 is an apocalyptic number.

2123442140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2123442140 is an abundant number, since it is smaller than the sum of its proper divisors (2430665572).

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

2123442140 is a wasteful number, since it uses less digits than its factorization.

2123442140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2259037 (or 2259035 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 2123442140 is about 46080.8218242687. The cubic root of 2123442140 is about 1285.3265462302.

Adding to 2123442140 its reverse (412443212), we get a palindrome (2535885352).

The spelling of 2123442140 in words is "two billion, one hundred twenty-three million, four hundred forty-two thousand, one hundred forty".