1813685051 has 2 divisors, whose sum is σ = 1813685052. Its totient is φ = 1813685050.

The previous prime is 1813684997. The next prime is 1813685053. The reversal of 1813685051 is 1505863181.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1813685051 - 2¹⁴ = 1813668667 is a prime.

Together with 1813685053, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1813684996 and 1813685014.

It is not a weakly prime, because it can be changed into another prime (1813685053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 906842525 + 906842526.

It is an arithmetic number, because the mean of its divisors is an integer number (906842526).

Almost surely, 2^1813685051 is an apocalyptic number.

1813685051 is a deficient number, since it is larger than the sum of its proper divisors (1).

1813685051 is an equidigital number, since it uses as much as digits as its factorization.

1813685051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 38.

The square root of 1813685051 is about 42587.3813588016. The cubic root of 1813685051 is about 1219.5154061703.

The spelling of 1813685051 in words is "one billion, eight hundred thirteen million, six hundred eighty-five thousand, fifty-one".