20434303010981 has 2 divisors, whose sum is σ = 20434303010982. Its totient is φ = 20434303010980.

The previous prime is 20434303010959. The next prime is 20434303011071. The reversal of 20434303010981 is 18901030343402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20018832526081 + 415470484900 = 4474241^2 + 644570^2 .

It is a cyclic number.

It is not a de Polignac number, because 20434303010981 - 2³⁴ = 20417123141797 is a prime.

It is a super-2 number, since 2×20434303010981² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20434303015981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10217151505490 + 10217151505491.

It is an arithmetic number, because the mean of its divisors is an integer number (10217151505491).

Almost surely, 2^{20434303010981} is an apocalyptic number.

It is an amenable number.

20434303010981 is a deficient number, since it is larger than the sum of its proper divisors (1).

20434303010981 is an equidigital number, since it uses as much as digits as its factorization.

20434303010981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 20434303010981 in words is "twenty trillion, four hundred thirty-four billion, three hundred three million, ten thousand, nine hundred eighty-one".