20592950981 has 2 divisors, whose sum is σ = 20592950982. Its totient is φ = 20592950980.

The previous prime is 20592950947. The next prime is 20592951017. The reversal of 20592950981 is 18905929502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19982366881 + 610584100 = 141359^2 + 24710^2 .

It is a cyclic number.

It is not a de Polignac number, because 20592950981 - 2¹⁰ = 20592949957 is a prime.

It is a super-2 number, since 2×20592950981² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20592956981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10296475490 + 10296475491.

It is an arithmetic number, because the mean of its divisors is an integer number (10296475491).

Almost surely, 2^20592950981 is an apocalyptic number.

It is an amenable number.

20592950981 is a deficient number, since it is larger than the sum of its proper divisors (1).

20592950981 is an equidigital number, since it uses as much as digits as its factorization.

20592950981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 583200, while the sum is 50.

The spelling of 20592950981 in words is "twenty billion, five hundred ninety-two million, nine hundred fifty thousand, nine hundred eighty-one".