1020340023 has 4 divisors (see below), whose sum is σ = 1360453368. Its totient is φ = 680226680.

The previous prime is 1020340021. The next prime is 1020340039. The reversal of 1020340023 is 3200430201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3200430201 = 3 ⋅1066810067.

It is a cyclic number.

It is not a de Polignac number, because 1020340023 - 2¹ = 1020340021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020339984 and 1020340011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020340021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170056668 + ... + 170056673.

It is an arithmetic number, because the mean of its divisors is an integer number (340113342).

Almost surely, 2^1020340023 is an apocalyptic number.

1020340023 is a deficient number, since it is larger than the sum of its proper divisors (340113345).

1020340023 is an equidigital number, since it uses as much as digits as its factorization.

1020340023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340113344.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 1020340023 is about 31942.7616683342. The cubic root of 1020340023 is about 1006.7345516671.

Adding to 1020340023 its reverse (3200430201), we get a palindrome (4220770224).

The spelling of 1020340023 in words is "one billion, twenty million, three hundred forty thousand, twenty-three".