20512521320354 has 8 divisors (see below), whose sum is σ = 35164322263488. Its totient is φ = 8791080565860.

The previous prime is 20512521320351. The next prime is 20512521320359. The reversal of 20512521320354 is 45302312521502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20512521320351) 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, 732590047142 + ... + 732590047169.

It is an arithmetic number, because the mean of its divisors is an integer number (4395540282936).

Almost surely, 2^{20512521320354} is an apocalyptic number.

20512521320354 is a deficient number, since it is larger than the sum of its proper divisors (14651800943134).

20512521320354 is a wasteful number, since it uses less digits than its factorization.

20512521320354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465180094320.

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 20512521320354 its reverse (45302312521502), we get a palindrome (65814833841856).

The spelling of 20512521320354 in words is "twenty trillion, five hundred twelve billion, five hundred twenty-one million, three hundred twenty thousand, three hundred fifty-four".