20220320977 has 2 divisors, whose sum is σ = 20220320978. Its totient is φ = 20220320976.

The previous prime is 20220320969. The next prime is 20220320983. The reversal of 20220320977 is 77902302202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19701210321 + 519110656 = 140361^2 + 22784^2 .

It is a cyclic number.

It is not a de Polignac number, because 20220320977 - 2³ = 20220320969 is a prime.

It is a super-2 number, since 2×20220320977² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20220326977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110160488 + 10110160489.

It is an arithmetic number, because the mean of its divisors is an integer number (10110160489).

Almost surely, 2^20220320977 is an apocalyptic number.

It is an amenable number.

20220320977 is a deficient number, since it is larger than the sum of its proper divisors (1).

20220320977 is an equidigital number, since it uses as much as digits as its factorization.

20220320977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 34.

The spelling of 20220320977 in words is "twenty billion, two hundred twenty million, three hundred twenty thousand, nine hundred seventy-seven".