1630020323 has 4 divisors (see below), whose sum is σ = 1630225080. Its totient is φ = 1629815568.

The previous prime is 1630020319. The next prime is 1630020341. The reversal of 1630020323 is 3230200361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1630020323 - 2² = 1630020319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1630020295 and 1630020304.

It is not an unprimeable number, because it can be changed into a prime (1630020523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89933 + ... + 106526.

It is an arithmetic number, because the mean of its divisors is an integer number (407556270).

Almost surely, 2^1630020323 is an apocalyptic number.

1630020323 is a deficient number, since it is larger than the sum of its proper divisors (204757).

1630020323 is an equidigital number, since it uses as much as digits as its factorization.

1630020323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204756.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 1630020323 is about 40373.5101644630. The cubic root of 1630020323 is about 1176.8768129974.

Adding to 1630020323 its reverse (3230200361), we get a palindrome (4860220684).

The spelling of 1630020323 in words is "one billion, six hundred thirty million, twenty thousand, three hundred twenty-three".