2143454420 has 12 divisors (see below), whose sum is σ = 4501254324. Its totient is φ = 857381760.

The previous prime is 2143454407. The next prime is 2143454431. The reversal of 2143454420 is 244543412.

It can be written as a sum of positive squares in 2 ways, for example, as 925863184 + 1217591236 = 30428^2 + 34894^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53586341 + ... + 53586380.

It is an arithmetic number, because the mean of its divisors is an integer number (375104527).

Almost surely, 2^2143454420 is an apocalyptic number.

2143454420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2143454420 is an abundant number, since it is smaller than the sum of its proper divisors (2357799904).

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

2143454420 is a wasteful number, since it uses less digits than its factorization.

2143454420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107172730 (or 107172728 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 29.

The square root of 2143454420 is about 46297.4558696264. The cubic root of 2143454420 is about 1289.3517605197.

Adding to 2143454420 its reverse (244543412), we get a palindrome (2387997832).

The spelling of 2143454420 in words is "two billion, one hundred forty-three million, four hundred fifty-four thousand, four hundred twenty".