20343422977 has 2 divisors, whose sum is σ = 20343422978. Its totient is φ = 20343422976.

The previous prime is 20343422941. The next prime is 20343423011. The reversal of 20343422977 is 77922434302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18497088016 + 1846334961 = 136004^2 + 42969^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20343422977 is a prime.

It is a super-2 number, since 2×20343422977² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20343422377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10171711488 + 10171711489.

It is an arithmetic number, because the mean of its divisors is an integer number (10171711489).

It is a Proth number, since it is equal to 19401 ⋅ 2²⁰ + 1 and 19401 < 2²⁰.

Almost surely, 2^20343422977 is an apocalyptic number.

It is an amenable number.

20343422977 is a deficient number, since it is larger than the sum of its proper divisors (1).

20343422977 is an equidigital number, since it uses as much as digits as its factorization.

20343422977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 43.

The spelling of 20343422977 in words is "twenty billion, three hundred forty-three million, four hundred twenty-two thousand, nine hundred seventy-seven".