20002859977 has 2 divisors, whose sum is σ = 20002859978. Its totient is φ = 20002859976.

The previous prime is 20002859963. The next prime is 20002859999. The reversal of 20002859977 is 77995820002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19190837961 + 812022016 = 138531^2 + 28496^2 .

It is a cyclic number.

It is not a de Polignac number, because 20002859977 - 2²⁷ = 19868642249 is a prime.

It is a super-2 number, since 2×20002859977² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20002859977.

It is not a weakly prime, because it can be changed into another prime (20002859477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001429988 + 10001429989.

It is an arithmetic number, because the mean of its divisors is an integer number (10001429989).

Almost surely, 2^20002859977 is an apocalyptic number.

It is an amenable number.

20002859977 is a deficient number, since it is larger than the sum of its proper divisors (1).

20002859977 is an equidigital number, since it uses as much as digits as its factorization.

20002859977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635040, while the sum is 49.

The spelling of 20002859977 in words is "twenty billion, two million, eight hundred fifty-nine thousand, nine hundred seventy-seven".