21262763163 has 4 divisors (see below), whose sum is σ = 28350350888. Its totient is φ = 14175175440.

The previous prime is 21262763161. The next prime is 21262763167. The reversal of 21262763163 is 36136726212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21262763163 - 2¹ = 21262763161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21262763161) 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 3 ways as a sum of consecutive naturals, for example, 3543793858 + ... + 3543793863.

It is an arithmetic number, because the mean of its divisors is an integer number (7087587722).

Almost surely, 2^21262763163 is an apocalyptic number.

21262763163 is a deficient number, since it is larger than the sum of its proper divisors (7087587725).

21262763163 is an equidigital number, since it uses as much as digits as its factorization.

21262763163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7087587724.

The product of its digits is 108864, while the sum is 39.

The spelling of 21262763163 in words is "twenty-one billion, two hundred sixty-two million, seven hundred sixty-three thousand, one hundred sixty-three".