20220009977 has 2 divisors, whose sum is σ = 20220009978. Its totient is φ = 20220009976.

The previous prime is 20220009917. The next prime is 20220010003. The reversal of 20220009977 is 77990002202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20217711721 + 2298256 = 142189^2 + 1516^2 .

It is a cyclic number.

It is not a de Polignac number, because 20220009977 - 2¹⁴ = 20219993593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20220009977.

It is not a weakly prime, because it can be changed into another prime (20220009917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110004988 + 10110004989.

It is an arithmetic number, because the mean of its divisors is an integer number (10110004989).

Almost surely, 2^20220009977 is an apocalyptic number.

It is an amenable number.

20220009977 is a deficient number, since it is larger than the sum of its proper divisors (1).

20220009977 is an equidigital number, since it uses as much as digits as its factorization.

20220009977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 38.

The spelling of 20220009977 in words is "twenty billion, two hundred twenty million, nine thousand, nine hundred seventy-seven".