20760562981 has 2 divisors, whose sum is σ = 20760562982. Its totient is φ = 20760562980.

The previous prime is 20760562943. The next prime is 20760562997. The reversal of 20760562981 is 18926506702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15411981025 + 5348581956 = 124145^2 + 73134^2 .

It is a cyclic number.

It is not a de Polignac number, because 20760562981 - 2¹⁹ = 20760038693 is a prime.

It is a super-2 number, since 2×20760562981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20760562931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10380281490 + 10380281491.

It is an arithmetic number, because the mean of its divisors is an integer number (10380281491).

Almost surely, 2^20760562981 is an apocalyptic number.

It is an amenable number.

20760562981 is a deficient number, since it is larger than the sum of its proper divisors (1).

20760562981 is an equidigital number, since it uses as much as digits as its factorization.

20760562981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 20760562981 in words is "twenty billion, seven hundred sixty million, five hundred sixty-two thousand, nine hundred eighty-one".