1820143424 has 56 divisors (see below), whose sum is σ = 4067348736. Its totient is φ = 800640000.

The previous prime is 1820143417. The next prime is 1820143427. The reversal of 1820143424 is 4243410281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820143427) 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, 19877 + ... + 63524.

Almost surely, 2^1820143424 is an apocalyptic number.

It is an amenable number.

1820143424 is an abundant number, since it is smaller than the sum of its proper divisors (2247205312).

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

1820143424 is a wasteful number, since it uses less digits than its factorization.

1820143424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83455 (or 83445 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 1820143424 is about 42663.1389374950. The cubic root of 1820143424 is about 1220.9612204323.

The spelling of 1820143424 in words is "one billion, eight hundred twenty million, one hundred forty-three thousand, four hundred twenty-four".