20732522749 has 2 divisors, whose sum is σ = 20732522750. Its totient is φ = 20732522748.

The previous prime is 20732522747. The next prime is 20732522777. The reversal of 20732522749 is 94722523702.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20422410649 + 310112100 = 142907^2 + 17610^2 .

It is a cyclic number.

It is not a de Polignac number, because 20732522749 - 2¹ = 20732522747 is a prime.

Together with 20732522747, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20732522747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10366261374 + 10366261375.

It is an arithmetic number, because the mean of its divisors is an integer number (10366261375).

Almost surely, 2^20732522749 is an apocalyptic number.

It is an amenable number.

20732522749 is a deficient number, since it is larger than the sum of its proper divisors (1).

20732522749 is an equidigital number, since it uses as much as digits as its factorization.

20732522749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423360, while the sum is 43.

The spelling of 20732522749 in words is "twenty billion, seven hundred thirty-two million, five hundred twenty-two thousand, seven hundred forty-nine".