20413323235506 has 16 divisors (see below), whose sum is σ = 40827045001248. Its totient is φ = 6804374656800.

The previous prime is 20413323235457. The next prime is 20413323235511. The reversal of 20413323235506 is 60553232331402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15937480 + ... + 17170611.

It is an arithmetic number, because the mean of its divisors is an integer number (2551690312578).

Almost surely, 2^{20413323235506} is an apocalyptic number.

20413323235506 is an abundant number, since it is smaller than the sum of its proper divisors (20413721765742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20413323235506 is a wasteful number, since it uses less digits than its factorization.

20413323235506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33210857.

The product of its (nonzero) digits is 388800, while the sum is 39.

Adding to 20413323235506 its reverse (60553232331402), we get a palindrome (80966555566908).

The spelling of 20413323235506 in words is "twenty trillion, four hundred thirteen billion, three hundred twenty-three million, two hundred thirty-five thousand, five hundred six".