20660550345 has 36 divisors (see below), whose sum is σ = 36663964740. Its totient is φ = 10762661952.

The previous prime is 20660550283. The next prime is 20660550371. The reversal of 20660550345 is 54305506602.

It is a happy number.

20660550345 is a `hidden beast` number, since 2 + 0 + 6 + 60 + 550 + 3 + 45 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5578745481 + 15081804864 = 74691^2 + 122808^2 .

It is not a de Polignac number, because 20660550345 - 2¹⁰ = 20660549321 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 40950 + ... + 207359.

It is an arithmetic number, because the mean of its divisors is an integer number (1018443465).

Almost surely, 2^20660550345 is an apocalyptic number.

It is an amenable number.

20660550345 is a deficient number, since it is larger than the sum of its proper divisors (16003414395).

20660550345 is a wasteful number, since it uses less digits than its factorization.

20660550345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248406 (or 248360 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The spelling of 20660550345 in words is "twenty billion, six hundred sixty million, five hundred fifty thousand, three hundred forty-five".