20977133263 has 2 divisors, whose sum is σ = 20977133264. Its totient is φ = 20977133262.

The previous prime is 20977133237. The next prime is 20977133297. The reversal of 20977133263 is 36233177902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20977133263 - 2⁵ = 20977133231 is a prime.

It is a super-2 number, since 2×20977133263² (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 (20977133213) 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 as a sum of consecutive naturals, namely, 10488566631 + 10488566632.

It is an arithmetic number, because the mean of its divisors is an integer number (10488566632).

Almost surely, 2^20977133263 is an apocalyptic number.

20977133263 is a deficient number, since it is larger than the sum of its proper divisors (1).

20977133263 is an equidigital number, since it uses as much as digits as its factorization.

20977133263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 43.

The spelling of 20977133263 in words is "twenty billion, nine hundred seventy-seven million, one hundred thirty-three thousand, two hundred sixty-three".