20030430120505 has 16 divisors (see below), whose sum is σ = 27471625280640. Its totient is φ = 13734491524992.

The previous prime is 20030430120497. The next prime is 20030430120523. The reversal of 20030430120505 is 50502103403002.

It is not a de Polignac number, because 20030430120505 - 2³ = 20030430120497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20030430120505.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13022899 + ... + 14479528.

It is an arithmetic number, because the mean of its divisors is an integer number (1716976580040).

Almost surely, 2^{20030430120505} is an apocalyptic number.

It is an amenable number.

20030430120505 is a deficient number, since it is larger than the sum of its proper divisors (7441195160135).

20030430120505 is a wasteful number, since it uses less digits than its factorization.

20030430120505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27523248.

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 20030430120505 its reverse (50502103403002), we get a palindrome (70532533523507).

The spelling of 20030430120505 in words is "twenty trillion, thirty billion, four hundred thirty million, one hundred twenty thousand, five hundred five".