1819813213 has 8 divisors (see below), whose sum is σ = 1824534432. Its totient is φ = 1815099696.

The previous prime is 1819813211. The next prime is 1819813223. The reversal of 1819813213 is 3123189181.

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 1819813213 - 2¹ = 1819813211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1819813211) 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, 1040806 + ... + 1042552.

It is an arithmetic number, because the mean of its divisors is an integer number (228066804).

Almost surely, 2^1819813213 is an apocalyptic number.

It is an amenable number.

1819813213 is a deficient number, since it is larger than the sum of its proper divisors (4721219).

1819813213 is a wasteful number, since it uses less digits than its factorization.

1819813213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3851.

The product of its digits is 10368, while the sum is 37.

The square root of 1819813213 is about 42659.2687818251. The cubic root of 1819813213 is about 1220.8873802422.

The spelling of 1819813213 in words is "one billion, eight hundred nineteen million, eight hundred thirteen thousand, two hundred thirteen".