20550605057 has 8 divisors (see below), whose sum is σ = 21836357856. Its totient is φ = 19273396032.

The previous prime is 20550605017. The next prime is 20550605113. The reversal of 20550605057 is 75050605502.

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 20550605057 - 2²⁸ = 20282169601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20550605017) 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, 2130983 + ... + 2140604.

It is an arithmetic number, because the mean of its divisors is an integer number (2729544732).

Almost surely, 2^20550605057 is an apocalyptic number.

It is an amenable number.

20550605057 is a deficient number, since it is larger than the sum of its proper divisors (1285752799).

20550605057 is a wasteful number, since it uses less digits than its factorization.

20550605057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4271887.

The product of its (nonzero) digits is 52500, while the sum is 35.

The spelling of 20550605057 in words is "twenty billion, five hundred fifty million, six hundred five thousand, fifty-seven".