20054501620511 has 4 divisors (see below), whose sum is σ = 20056957181712. Its totient is φ = 20052046059312.

The previous prime is 20054501620477. The next prime is 20054501620553. The reversal of 20054501620511 is 11502610545002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20054501620511 is a prime.

It is a super-3 number, since 3×20054501620511³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20054501620561) 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, 1227768350 + ... + 1227784683.

It is an arithmetic number, because the mean of its divisors is an integer number (5014239295428).

Almost surely, 2^{20054501620511} is an apocalyptic number.

20054501620511 is a deficient number, since it is larger than the sum of its proper divisors (2455561201).

20054501620511 is an equidigital number, since it uses as much as digits as its factorization.

20054501620511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455561200.

The product of its (nonzero) digits is 12000, while the sum is 32.

The spelling of 20054501620511 in words is "twenty trillion, fifty-four billion, five hundred one million, six hundred twenty thousand, five hundred eleven".