20000259977 has 4 divisors (see below), whose sum is σ = 21176745876. Its totient is φ = 18823774080.

The previous prime is 20000259971. The next prime is 20000259991. The reversal of 20000259977 is 77995200002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77995200002 = 2 ⋅38997600001.

It can be written as a sum of positive squares in 2 ways, for example, as 6558408256 + 13441851721 = 80984^2 + 115939^2 .

It is a cyclic number.

It is not a de Polignac number, because 20000259977 - 2¹⁰ = 20000258953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20000259971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 588242924 + ... + 588242957.

It is an arithmetic number, because the mean of its divisors is an integer number (5294186469).

Almost surely, 2^20000259977 is an apocalyptic number.

It is an amenable number.

20000259977 is a deficient number, since it is larger than the sum of its proper divisors (1176485899).

20000259977 is a wasteful number, since it uses less digits than its factorization.

20000259977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176485898.

The product of its (nonzero) digits is 79380, while the sum is 41.

Adding to 20000259977 its reverse (77995200002), we get a palindrome (97995459979).

The spelling of 20000259977 in words is "twenty billion, two hundred fifty-nine thousand, nine hundred seventy-seven".