20550442113 has 12 divisors (see below), whose sum is σ = 29698141200. Its totient is φ = 13693755096.

The previous prime is 20550442091. The next prime is 20550442117. The reversal of 20550442113 is 31124405502.

20550442113 is a `hidden beast` number, since 2 + 0 + 5 + 504 + 42 + 113 = 666.

It is not a de Polignac number, because 20550442113 - 2¹² = 20550438017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20550442117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 525031 + ... + 562812.

It is an arithmetic number, because the mean of its divisors is an integer number (2474845100).

Almost surely, 2^20550442113 is an apocalyptic number.

It is an amenable number.

20550442113 is a deficient number, since it is larger than the sum of its proper divisors (9147699087).

20550442113 is a wasteful number, since it uses less digits than its factorization.

20550442113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089948 (or 1089945 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 20550442113 its reverse (31124405502), we get a palindrome (51674847615).

The spelling of 20550442113 in words is "twenty billion, five hundred fifty million, four hundred forty-two thousand, one hundred thirteen".