20102210977 has 2 divisors, whose sum is σ = 20102210978. Its totient is φ = 20102210976.

The previous prime is 20102210929. The next prime is 20102211001. The reversal of 20102210977 is 77901220102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20094763536 + 7447441 = 141756^2 + 2729^2 .

It is a cyclic number.

It is not a de Polignac number, because 20102210977 - 2²³ = 20093822369 is a prime.

It is not a weakly prime, because it can be changed into another prime (20102210477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051105488 + 10051105489.

It is an arithmetic number, because the mean of its divisors is an integer number (10051105489).

Almost surely, 2^20102210977 is an apocalyptic number.

It is an amenable number.

20102210977 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102210977 is an equidigital number, since it uses as much as digits as its factorization.

20102210977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 31.

The spelling of 20102210977 in words is "twenty billion, one hundred two million, two hundred ten thousand, nine hundred seventy-seven".