20497082263 has 4 divisors (see below), whose sum is σ = 23425236880. Its totient is φ = 17568927648.

The previous prime is 20497082237. The next prime is 20497082279. The reversal of 20497082263 is 36228079402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36228079402 = 2 ⋅18114039701.

It is a cyclic number.

It is not a de Polignac number, because 20497082263 - 2⁹ = 20497081751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20497082213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1464077298 + ... + 1464077311.

It is an arithmetic number, because the mean of its divisors is an integer number (5856309220).

Almost surely, 2^20497082263 is an apocalyptic number.

20497082263 is a deficient number, since it is larger than the sum of its proper divisors (2928154617).

20497082263 is an equidigital number, since it uses as much as digits as its factorization.

20497082263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2928154616.

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 20497082263 in words is "twenty billion, four hundred ninety-seven million, eighty-two thousand, two hundred sixty-three".