20466605297 has 6 divisors (see below), whose sum is σ = 20491197858. Its totient is φ = 20442042192.

The previous prime is 20466605281. The next prime is 20466605309. The reversal of 20466605297 is 79250666402.

It can be written as a sum of positive squares in only one way, i.e., 19846047376 + 620557921 = 140876^2 + 24911^2 .

It is not a de Polignac number, because 20466605297 - 2⁴ = 20466605281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20466602297) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 724013 + ... + 751749.

It is an arithmetic number, because the mean of its divisors is an integer number (3415199643).

Almost surely, 2^20466605297 is an apocalyptic number.

It is an amenable number.

20466605297 is a deficient number, since it is larger than the sum of its proper divisors (24592561).

20466605297 is an frugal number, since it uses more digits than its factorization.

20466605297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29455 (or 28596 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 47.

The spelling of 20466605297 in words is "twenty billion, four hundred sixty-six million, six hundred five thousand, two hundred ninety-seven".