20550057 has 8 divisors (see below), whose sum is σ = 29891040. Its totient is φ = 12454560.

The previous prime is 20550041. The next prime is 20550071. The reversal of 20550057 is 75005502.

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

It is not a de Polignac number, because 20550057 - 2⁴ = 20550041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20550007) 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, 311332 + ... + 311397.

It is an arithmetic number, because the mean of its divisors is an integer number (3736380).

Almost surely, 2^20550057 is an apocalyptic number.

It is an amenable number.

20550057 is a deficient number, since it is larger than the sum of its proper divisors (9340983).

20550057 is a wasteful number, since it uses less digits than its factorization.

20550057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622743.

The product of its (nonzero) digits is 1750, while the sum is 24.

The square root of 20550057 is about 4533.2170695876. The cubic root of 20550057 is about 273.9077646107.

Adding to 20550057 its reverse (75005502), we get a palindrome (95555559).

Subtracting 20550057 from its reverse (75005502), we obtain a palindrome (54455445).

The spelling of 20550057 in words is "twenty million, five hundred fifty thousand, fifty-seven".