20345020052551 has 8 divisors (see below), whose sum is σ = 20414649888864. Its totient is φ = 20275391529120.

The previous prime is 20345020052509. The next prime is 20345020052573. The reversal of 20345020052551 is 15525002054302.

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

It is a cyclic number.

It is not a de Polignac number, because 20345020052551 - 2¹⁹ = 20345019528263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20345020055551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38600886 + ... + 39124396.

It is an arithmetic number, because the mean of its divisors is an integer number (2551831236108).

Almost surely, 2^{20345020052551} is an apocalyptic number.

20345020052551 is a deficient number, since it is larger than the sum of its proper divisors (69629836313).

20345020052551 is a wasteful number, since it uses less digits than its factorization.

20345020052551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656441.

The product of its (nonzero) digits is 60000, while the sum is 34.

The spelling of 20345020052551 in words is "twenty trillion, three hundred forty-five billion, twenty million, fifty-two thousand, five hundred fifty-one".