20275481663 has 16 divisors (see below), whose sum is σ = 21816732672. Its totient is φ = 18795480000.

The previous prime is 20275481651. The next prime is 20275481713. The reversal of 20275481663 is 36618457202.

It is a Cunningham number, because it is equal to 142392²-1.

It is a cyclic number.

It is not a de Polignac number, because 20275481663 - 2¹⁴ = 20275465279 is a prime.

It is a super-2 number, since 2×20275481663² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20275481263) 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 in 15 ways as a sum of consecutive naturals, for example, 71198 + ... + 213588.

It is an arithmetic number, because the mean of its divisors is an integer number (1363545792).

Almost surely, 2^20275481663 is an apocalyptic number.

20275481663 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20275481663 is a deficient number, since it is larger than the sum of its proper divisors (1541251009).

20275481663 is a wasteful number, since it uses less digits than its factorization.

20275481663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142606.

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 20275481663 in words is "twenty billion, two hundred seventy-five million, four hundred eighty-one thousand, six hundred sixty-three".