1819746813 has 8 divisors (see below), whose sum is σ = 2426528608. Its totient is φ = 1213064784.

The previous prime is 1819746767. The next prime is 1819746857. The reversal of 1819746813 is 3186479181.

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

It is not a de Polignac number, because 1819746813 - 2²⁸ = 1551311357 is a prime.

It is a super-2 number, since 2×1819746813² = 6622956926847313938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1819746013) 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, 48606 + ... + 77472.

It is an arithmetic number, because the mean of its divisors is an integer number (303316076).

Almost surely, 2^1819746813 is an apocalyptic number.

It is an amenable number.

1819746813 is a deficient number, since it is larger than the sum of its proper divisors (606781795).

1819746813 is a wasteful number, since it uses less digits than its factorization.

1819746813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49883.

The product of its digits is 290304, while the sum is 48.

The square root of 1819746813 is about 42658.4905147850. The cubic root of 1819746813 is about 1220.8725311160.

The spelling of 1819746813 in words is "one billion, eight hundred nineteen million, seven hundred forty-six thousand, eight hundred thirteen".