2543206420 has 24 divisors (see below), whose sum is σ = 5358142944. Its totient is φ = 1013966496.

The previous prime is 2543206357. The next prime is 2543206429. The reversal of 2543206420 is 246023452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543206429) 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, 200962 + ... + 213241.

It is an arithmetic number, because the mean of its divisors is an integer number (223255956).

Almost surely, 2^2543206420 is an apocalyptic number.

2543206420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2543206420 is an abundant number, since it is smaller than the sum of its proper divisors (2814936524).

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

2543206420 is a wasteful number, since it uses less digits than its factorization.

2543206420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414519 (or 414517 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 2543206420 is about 50430.2133646091. The cubic root of 2543206420 is about 1364.9828780384.

Adding to 2543206420 its reverse (246023452), we get a palindrome (2789229872).

The spelling of 2543206420 in words is "two billion, five hundred forty-three million, two hundred six thousand, four hundred twenty".