20900483977 has 2 divisors, whose sum is σ = 20900483978. Its totient is φ = 20900483976.

The previous prime is 20900483971. The next prime is 20900484013. The reversal of 20900483977 is 77938400902.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13923056016 + 6977427961 = 117996^2 + 83531^2 .

It is a cyclic number.

It is not a de Polignac number, because 20900483977 - 2²⁷ = 20766266249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20900483977.

It is not a weakly prime, because it can be changed into another prime (20900483971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10450241988 + 10450241989.

It is an arithmetic number, because the mean of its divisors is an integer number (10450241989).

Almost surely, 2^20900483977 is an apocalyptic number.

It is an amenable number.

20900483977 is a deficient number, since it is larger than the sum of its proper divisors (1).

20900483977 is an equidigital number, since it uses as much as digits as its factorization.

20900483977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 49.

The spelling of 20900483977 in words is "twenty billion, nine hundred million, four hundred eighty-three thousand, nine hundred seventy-seven".