1813473842 has 4 divisors (see below), whose sum is σ = 2720210766. Its totient is φ = 906736920.

The previous prime is 1813473841. The next prime is 1813473901. The reversal of 1813473842 is 2483743181.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1476788041 + 336685801 = 38429^2 + 18349^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1813473842.

It is not an unprimeable number, because it can be changed into a prime (1813473841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 453368459 + ... + 453368462.

Almost surely, 2^1813473842 is an apocalyptic number.

1813473842 is a deficient number, since it is larger than the sum of its proper divisors (906736924).

1813473842 is an equidigital number, since it uses as much as digits as its factorization.

1813473842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906736923.

The product of its digits is 129024, while the sum is 41.

The square root of 1813473842 is about 42584.9015732102. The cubic root of 1813473842 is about 1219.4680656047.

The spelling of 1813473842 in words is "one billion, eight hundred thirteen million, four hundred seventy-three thousand, eight hundred forty-two".