1620022423 has 2 divisors, whose sum is σ = 1620022424. Its totient is φ = 1620022422.

The previous prime is 1620022409. The next prime is 1620022471. The reversal of 1620022423 is 3242200261.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1620022423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1620022394 and 1620022403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1620022493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810011211 + 810011212.

It is an arithmetic number, because the mean of its divisors is an integer number (810011212).

Almost surely, 2^1620022423 is an apocalyptic number.

1620022423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1620022423 is an equidigital number, since it uses as much as digits as its factorization.

1620022423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1620022423 is about 40249.5021459893. The cubic root of 1620022423 is about 1174.4657110341.

Adding to 1620022423 its reverse (3242200261), we get a palindrome (4862222684).

The spelling of 1620022423 in words is "one billion, six hundred twenty million, twenty-two thousand, four hundred twenty-three".