1820130451 has 8 divisors (see below), whose sum is σ = 1884352320. Its totient is φ = 1756005888.

The previous prime is 1820130443. The next prime is 1820130457. The reversal of 1820130451 is 1540310281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1820130451 - 2³ = 1820130443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1820130457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14835 + ... + 62131.

It is an arithmetic number, because the mean of its divisors is an integer number (235544040).

Almost surely, 2^1820130451 is an apocalyptic number.

1820130451 is a deficient number, since it is larger than the sum of its proper divisors (64221869).

1820130451 is a wasteful number, since it uses less digits than its factorization.

1820130451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48653.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 1820130451 is about 42662.9868973095. The cubic root of 1820130451 is about 1220.9583196412.

The spelling of 1820130451 in words is "one billion, eight hundred twenty million, one hundred thirty thousand, four hundred fifty-one".