20277041321 has 2 divisors, whose sum is σ = 20277041322. Its totient is φ = 20277041320.

The previous prime is 20277041299. The next prime is 20277041327. The reversal of 20277041321 is 12314077202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18551802025 + 1725239296 = 136205^2 + 41536^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20277041321 is a prime.

It is a super-2 number, since 2×20277041321² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20277041327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10138520660 + 10138520661.

It is an arithmetic number, because the mean of its divisors is an integer number (10138520661).

Almost surely, 2^20277041321 is an apocalyptic number.

It is an amenable number.

20277041321 is a deficient number, since it is larger than the sum of its proper divisors (1).

20277041321 is an equidigital number, since it uses as much as digits as its factorization.

20277041321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 29.

The spelling of 20277041321 in words is "twenty billion, two hundred seventy-seven million, forty-one thousand, three hundred twenty-one".