21275700763 has 4 divisors (see below), whose sum is σ = 21276011080. Its totient is φ = 21275390448.

The previous prime is 21275700749. The next prime is 21275700773. The reversal of 21275700763 is 36700757212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21275700763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21275700773) 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, 1770 + ... + 206287.

It is an arithmetic number, because the mean of its divisors is an integer number (5319002770).

Almost surely, 2^21275700763 is an apocalyptic number.

21275700763 is a deficient number, since it is larger than the sum of its proper divisors (310317).

21275700763 is a wasteful number, since it uses less digits than its factorization.

21275700763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310316.

The product of its (nonzero) digits is 123480, while the sum is 40.

The spelling of 21275700763 in words is "twenty-one billion, two hundred seventy-five million, seven hundred thousand, seven hundred sixty-three".