2543366420 has 72 divisors (see below), whose sum is σ = 6149681664. Its totient is φ = 865542528.

The previous prime is 2543366411. The next prime is 2543366437. The reversal of 2543366420 is 246633452.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4189757 + ... + 4190363.

Almost surely, 2^2543366420 is an apocalyptic number.

2543366420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2543366420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3074840832).

2543366420 is an abundant number, since it is smaller than the sum of its proper divisors (3606315244).

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

2543366420 is a wasteful number, since it uses less digits than its factorization.

2543366420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969 (or 794 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 35.

The square root of 2543366420 is about 50431.7996902748. The cubic root of 2543366420 is about 1365.0115023607.

Adding to 2543366420 its reverse (246633452), we get a palindrome (2789999872).

The spelling of 2543366420 in words is "two billion, five hundred forty-three million, three hundred sixty-six thousand, four hundred twenty".