20662050049 has 3 divisors (see below), whose sum is σ = 20662193793. Its totient is φ = 20661906306.

The previous prime is 20662050043. The next prime is 20662050077. The reversal of 20662050049 is 94005026602.

The square root of 20662050049 is 143743.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 20662050049 - 2³ = 20662050041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20662049996 and 20662050023.

It is not an unprimeable number, because it can be changed into a prime (20662050041) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 71872 + ... + 215614.

It is an arithmetic number, because the mean of its divisors is an integer number (6887397931).

Almost surely, 2^20662050049 is an apocalyptic number.

20662050049 is the 143743-rd square number.

20662050049 is the 71872-nd centered octagonal number.

It is an amenable number.

20662050049 is a deficient number, since it is larger than the sum of its proper divisors (143744).

20662050049 is an frugal number, since it uses more digits than its factorization.

20662050049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287486 (or 143743 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 20662050049 in words is "twenty billion, six hundred sixty-two million, fifty thousand, forty-nine".