20500454055 has 8 divisors (see below), whose sum is σ = 32800726512. Its totient is φ = 10933575488.

The previous prime is 20500454041. The next prime is 20500454077. The reversal of 20500454055 is 55045400502.

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 20500454055 - 2¹⁰ = 20500453031 is a prime.

It is a super-2 number, since 2×20500454055² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 683348454 + ... + 683348483.

It is an arithmetic number, because the mean of its divisors is an integer number (4100090814).

Almost surely, 2^20500454055 is an apocalyptic number.

20500454055 is a deficient number, since it is larger than the sum of its proper divisors (12300272457).

20500454055 is a wasteful number, since it uses less digits than its factorization.

20500454055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366696945.

The product of its (nonzero) digits is 20000, while the sum is 30.

Adding to 20500454055 its reverse (55045400502), we get a palindrome (75545854557).

The spelling of 20500454055 in words is "twenty billion, five hundred million, four hundred fifty-four thousand, fifty-five".