1820023 has 2 divisors, whose sum is σ = 1820024. Its totient is φ = 1820022.

The previous prime is 1820009. The next prime is 1820033. The reversal of 1820023 is 3200281.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1820023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1819979 and 1820006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1820033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 910011 + 910012.

It is an arithmetic number, because the mean of its divisors is an integer number (910012).

2^1820023 is an apocalyptic number.

1820023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1820023 is an equidigital number, since it uses as much as digits as its factorization.

1820023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1820023 is about 1349.0822806634. The cubic root of 1820023 is about 122.0934292833.

The spelling of 1820023 in words is "one million, eight hundred twenty thousand, twenty-three".